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Q:
The empirical rule says that approximately what percentage of the values would be within 1 standard deviation of the mean in a bell shaped set of data?
a) 95%
b) 68%
c) 50%
d) 97.7%
e) 100%
Q:
The empirical rule says that approximately what percentage of the values would be within 2 standard deviations of the mean in a bell shaped set of data?
a) 95%
b) 68%
c) 50%
d) 97.7%
e) 100%
Q:
The number of standard deviations that a value (x) is above or below the mean is the _________________.
a) absolute deviation
b) coefficient of variation
c) interquartile range
d) z score
e) correlation coefficient
Q:
A sample was taken of the salaries of four employees from a large company. The following are their salaries (in thousands of dollars) for this year: 33, 36, 41, and 47. The variance of their salaries is approximately
a) 28.19
b) 75.59
c) 37.58
d) 6.13
e) 5.31
Q:
A sample was taken of the salaries of four employees from a large company. The following are their salaries (in thousands of dollars) for this year: 33, 36, 41, and 47. The median of their salaries is approximately
a) 38.5
b) 34.5
c) 34
d) 44.5
e) 38
Q:
A commuter travels many miles to work each morning. She has timed this trip 5 times during the last month. The time (in minutes) required to make this trip was 34, 39, 41, 35, and 41. The mode time required for this trip was _______.
a) 39
b) 41
c) 37.5
d) 38
e) 35
Q:
A commuter travels many miles to work each morning. She has timed this trip 5 times during the last month. The time (in minutes) required to make this trip was 34, 39, 41, 35, and 41. The median time (in minutes) required for this trip was _______.
a) 39
b) 41
c) 37.5
d) 38
e) 35.5
Q:
A commuter travels many miles to work each morning. She has timed this trip 5 times during the last month. The time (in minutes) required to make this trip was 34, 39, 41, 35, and 41. The mean time (in minutes) required for this trip was _______.
a) 35
b) 41
c) 37.5
d) 38
e) 35.5
Q:
A statistics student made the following grades on 7 tests: 76, 82, 92, 95, 79, 86, and 92. What is the mode?
a) 79
b) 82
c) 86
d) 92
e) 76
Q:
A statistics student made the following grades on 7 tests: 76, 82, 92, 95, 79, 86, and 92. What is the median grade?
a) 86
b) 76
c) 82
d) 94
e) 95
Q:
A statistics student made the following grades on 7 tests: 76, 82, 92, 95, 79, 86, and 92. What is the mean grade?
a) 78
b) 80
c) 86
d) 84
e) 88
Q:
An outlier of a data set is determined from the lower and upper quartile
Q:
A box and whisker plot is determined from the mean, the smallest and the largest values, and the lower and upper quartile.
Q:
If the median of a distribution is greater than mean, then the distribution is skewed to the left.
Q:
If the mean of a distribution is greater than the median, then the distribution is positively skewed.
Q:
Kurtosis is a measure of the association between two numerical variables.
Q:
A nonzero value of the skewness indicates asymmetry of the distribution of the data.
Q:
Skewness and kurtosis of a data set are measures of the shape of the distribution.
Q:
Computations of the variance and standard deviation using grouped data are potentially only approximation of the actual variance and standard deviation.
Q:
For grouped data, the mode is the class midpoint of the modal class where the model class is the class interval with the greatest frequency.
Q:
The median for ungrouped raw data is more complicated to compute then the median for grouped data.
Q:
For grouped data, the midpoint of each class interval is used to represent all the values in a class interval.
Q:
The coefficient of variation is unitless.
Q:
The sample standard deviation is calculated by taking the square root of the population standard deviation.
Q:
The average of the squared deviations about the arithmetic mean is called the variance.
Q:
The sum of deviations about the arithmetic mean is always equal to zero.
Q:
Average deviation is a common measure of the variability of data containing a set of numbers.
Q:
The middle value in an ordered array of numbers is called the mode.
Q:
The lowest appropriate level of measurement for the median is ordinal.
Q:
It is inappropriate to use the mean to analyze data that are not at least interval level in measurement.
Q:
An appropriate measure of central tendency for ordinal data is the mode.
Q:
The most frequently occurring value in a set of data is called the mode.
Q:
The most appropriate measure of central tendency for nominal-level data is the median.
Q:
Statistical measures used to yield information about the center or the middle parts of a group of numbers are called the measures of central tendency.
Q:
Consider the following stem and leaf plot:StemLeaf10, 2, 5, 722, 3, 4, 430, 4, 6, 6, 945, 8, 8, 952, 7, 8Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.). What would be the relative frequency of the class 20-under 30?a) 0.4b) 0.25c) 0.20d) 4e) 0.50
Q:
A person has decided to construct a frequency distribution for a set of data containing 60 numbers. The lowest number is 23 and the highest number is 68. If 5 classes are used, the class width should be approximately _______.a) 4b) 12c) 8d) 5e) 9
Q:
The United Nations Development Programme website provides comparative data by country on key metrics. Two such metrics are life expectancy and expenditures on health as a percent of GDP. The table below show data on life expectancy and health expenditures in the United States.YearU.S. Life ExpectancyExpenditure on Health (%GDP)200076.85.8200577.66.7200677.77.1200777.97.2200878.17.6200978.28.4201078.49.5Which of the following scatterplots best depicts the relationship between life expectancy and expenditures on health as a percent of GDP?a.b.c.d.
Q:
The United Nations Development Programme website provides comparative data by country on key metrics, such metrics as life expectancy over time. The table below show data on life expectancy over time in the United States.Which of the following statements are not true based on the scatterplot of U.S. Life Expectancy over time?a. The life expectancy in the U.S. is increasing over time.b. U.S. citizens lived fewer years in 2010 than they did in in 2008.c. The scatterplot shows an increasing trend in life expectancy in the U.S.d. Based on the scatterplot, one can assume the life expectancy in 2014 will be higher than 78 years.e. All of the above statements are true.
Q:
The following graphic of cigarettes smoked (sold) per capita (CIG) and deaths per 100K population from lung cancer (LUNG) indicates _________ a) a weak relation between the two variables
b) a pretty strong relation between the two variables
c) when the number of cigarettes smoked (sold) per capita (CIG) increases the deaths per 100K population from lung cancer (LUNG)decreases
d) a negative relation between the two variables
e) no relation between the two variables
Q:
The following graphic of residential housing data (selling price and size in square feet) indicates _____________.a) an inverse relation between the two variablesb) no relation between the two variablesc) a direct relation between the two variablesd) a negative exponential relation between the two variablese) a sinusoidal relationship between the two variables
Q:
The following graphic of residential housing data (selling price and size in square feet) is a _____________.a) scatter plotb) Pareto chartc) pie chartd) cumulative histograme) cumulative frequency distribuion
Q:
Suppose a market survey of 200 consumers was conducted to determine the likelihood of each consumer purchasing a new computer next year. The data were collected based on the income level of the consumer and are shown below:Age BracketIntent to PurchaseComputer within 1 year<255425-345735-444945-5429>5511Total Surveyed200Using the table above, which of the following statements is true?a. Wealthier consumers are more likely to purchase a computer next year.b. Income does not seem to be related to likelihood of purchasing a computer next year.c. The wealthier a consumer is the less likely they are to purchase a computer next year.d. Individuals with greater than $120K are least likely to purchase a new computer next year.e. None of the above statements are true.
Q:
Suppose a market survey of 200 consumers was conducted to determine the likelihood of each consumer purchasing a new computer next year. The data were collected based on the age of the consumer and are shown below:Age BracketIntent to PurchaseComputer within 1 year<255425-345735-444945-5429>5511Total Surveyed200Using the table above, which of the following statements is true?a. Younger consumers are more likely to purchase a computer next year.b. Older consumers are more likely to purchase a computer next year.c. There does not appear to be a relationship between age and purchasing a computer.d. Individuals between 25 and 34 are most likely to purchase a new computer next year.e. None of the above statements are true.
Q:
According to the following graphic, "Bent Pins" account for ____% of PCB Failures.a) 10b) 20c) 30d) 40e) 50
Q:
According to the following graphic, the most common cause of PCB Failures is a _____________.a) Cracked Traceb) Bent Pinc) Missing Partd) Solder Bridgee) Wrong Part
Q:
The following graphic of PCB Failures is a _____________.a) Scatter Plotb) Pareto Chartc) Pie Chartd) Cumulative Histogram Charte) Line diagram
Q:
The 2010 and 2012 market share data of the three competitors (Alston, Baren, and Clemson) in an oligopolistic industry are presented in the following pie charts.Which of the following may be a false statement?a) Sales revenues declined at Clemson.b) Only Clemson lost market share.c) Alston gained market share.d) Baren gained market share.e) Both Alston and Baren gained market share
Q:
The 2010 and 2012 market share data of the three competitors (Alston, Baren, and Clemson) in an oligopolistic industry are presented in the following pie charts. Total sales for this industry were $1.5 billion in 2010 and $1.8 billion in 2012.Baren's sales in 2010 were ___________.a) $342 millionb) $630 millionc) $675 milliond) $828 millione) $928 million
Q:
The 2010 and 2012 market share data of the three competitors (Alston, Baren, and Clemson) in an oligopolistic industry are presented in the following pie charts. Total sales for this industry were $1.5 billion in 2010 and $1.8 billion in 2012. Clemson's sales in 2010 were ___________.a) $342 millionb) $630 millionc) $675 milliond) $828 millione) $928 million
Q:
The 2010 and 2012 market share data of the three competitors (Alston, Baren, and Clemson) in an oligopolistic industry are presented in the following pie charts.Which of the following is true?a) Only Baren share.b) Only Clemson lost market share.c) Alston lost market share.d) Baren lost market share.e) All companies lost market share
Q:
The following is a bar chart of the self-reported race for 189 pregnant women. Approximately _____ percent of pregnant women are African-American
a) 20
b) 14
c) 5
d) 35
e) 50
Q:
A recent survey of U.S. automobile owners showed the following preferences for exterior automobile colors:What are the top two color preferences for automobiles?a. White and Blackb. White and Red/ Maroonc. White and Blued. White and Siver/Greye. White and Other
Q:
A recent survey of U.S. automobile owners showed the following preferences for exterior automobile colors:What type of graph is used to depict exterior automobile color preferences?a. Frequency polygonb. Pareto chartc. Bar graphd. Ogivee. Histogram
Q:
The staffs of the accounting and the quality control departments rated their respective supervisor's leadership style as either (1) authoritarian or (2) participatory. Sixty-eight percent of the accounting staff rated their supervisor "authoritarian," and thirty-two percent rated him "participatory." Forty percent of the quality control staff rated their supervisor "authoritarian," and sixty percent rated her "participatory." The best graphic depiction of these data would be two ___________________.
a) histograms
b) frequency polygons
c) ogives
d) pie charts
e) scatter plots
Q:
An instructor has decided to graphically represent the grades on a test. The instructor uses a plus/minus grading system (i.e. she gives grades of A-, B+, etc.). Which of the following would provide the most information for the students?
a) A histogram
b) bar chart
c) A cumulative frequency distribution
d) A frequency distribution
e) A scatter plot
Q:
The staff of Ms. Tamara Hill, VP of Technical Analysis at Blue Sky Brokerage, prepared a frequency histogram of market capitalization of the 937 corporations listed on the American Stock Exchange in January 2013.Approximately ________ corporations had capitalizations of $200,000,000 or less.a) 50b) 100c) 700d) 800e) 900
Q:
The staff of Ms. Tamara Hill, VP of Technical Analysis at Blue Sky Brokerage, prepared a frequency histogram of market capitalization of the 937 corporations listed on the American Stock Exchange in January 2013.Approximately ________ corporations had capitalization exceeding $200,000,000.a) 50b) 100c) 700d) 800e) 890
Q:
The staff of Mr. Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a frequency histogram of waiting time for drive up ATM customers.Approximately ____ drive up ATM customers waited at least 7 minutes.a) 20b) 30c) 100d) 180e) 200
Q:
The staff of Mr. Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a frequency histogram of waiting time for drive up ATM customers. Approximately _____ drive up ATM customers waited less than 2 minutes.
a) 20
b) 30
c) 100
d) 180
e) 200
Q:
The staff of Mr. Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a cumulative frequency ogive of waiting time for walk-in customers. The percentage of walk-in customers waiting between 1 and 6 minutes was ___.
a) 22%
b) 11%
c) 37%
d) 10%
e) 67%
Q:
The staff of Mr. Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a cumulative frequency ogive of waiting time for walk-in customers. The percentage of walk-in customers waiting more than 6 minutes was ______.
a) 22%
b) 11%
c) 67%
d) 10%
e) 75%
Q:
The staff of Mr. Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a cumulative frequency ogive of waiting time for walk-in customers. The percentage of walk-in customers waiting one minute or less was _________.
a) 22%
b) 11%
c) 67%
d) 10%
e) 5%
Q:
The staff of Mr. Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a cumulative frequency ogive of waiting time for walk-in customers. The total number of walk-in customers included in the study was _________.
a) 100
b) 250
c) 300
d) 450
e) 500
Q:
Each day, the manager at Jamie's Auto Care prepares a frequency distribution and a histogram of sales transactions by dollar value of the transactions. Friday's histogram follows. On Friday, the approximate number of sales transactions between $150 and $175 was _____________.
a) 75
b) 200
c) 300
d) 400
e) 500
Q:
Each day, the manager at Jamie's Auto Care Shop prepares a frequency distribution and a histogram of sales transactions by dollar value of the transactions. Friday's histogram follows. On Friday, the approximate number of sales transactions in the 75-under 100 category was _____________.
a) 50
b) 100
c) 150
d) 200
e) 60
Q:
Each day, the office staff at Oasis Quick Shop prepares a frequency distribution and an ogive of sales transactions by dollar value of the transactions. Saturday's cumulative frequency ogive follows. The percentage of sales transactions on Saturday that were between $100 and $150 was _____________.
a) 20%
b) 40%
c) 60%
d) 80%
e) 10%
Q:
Each day, the office staff at Oasis Quick Shop prepares a frequency distribution and an ogive of sales transactions by dollar value of the transactions. Saturday's cumulative frequency ogive follows. The percentage of sales transactions on Saturday that were at least $100 each was _____________.
a) 100
b) 10
c) 80
d) 20
e) 15
Q:
Each day, the office staff at Oasis Quick Shop prepares a frequency distribution and an ogive of sales transactions by dollar value of the transactions. Saturday's cumulative frequency ogive follows. The percentage of sales transactions on Saturday that were under $100 each was _____________.
a) 100
b) 10
c) 80
d) 20
e) 15
Q:
Each day, the office staff at Oasis Quick Shop prepares a frequency distribution and an ogive of sales transactions by dollar value of the transactions. Saturday's cumulative frequency ogive follows. The total number of sales transactions on Saturday was _____________.
a) 200
b) 500
c) 300
d) 100
e) 400
Q:
The following represent the ages of students in a class:
19, 23, 21, 19, 19, 20, 22, 31, 21, 20
If a stem and leaf plot were to be developed from this, how many stems would there be?
a) 2
b) 3
c) 4
d) 5
e) 10
Q:
Consider the following stem and leaf plot:StemLeaf10, 2, 5, 722, 3, 4, 430, 4, 6, 6, 945, 8, 8, 952, 7, 8Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.). What is the cumulative frequency for the 30-under 40 class interval?a) 5b) 9c) 13d) 14e) 18
Q:
Consider the following stem and leaf plot:StemLeaf10, 2, 5, 722, 3, 4, 430, 4, 6, 6, 945, 8, 8, 952, 7, 8Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.). What was the lowest number in the data set?a) 0b) 10c) 7d) 2e) 1
Q:
Consider the following stem and leaf plot:StemLeaf10, 2, 5, 722, 3, 4, 430, 4, 6, 6, 945, 8, 8, 952, 7, 8Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.). What was the highest number in the data set?a) 50b) 58c) 59d) 78e) 98
Q:
Consider the following stem and leaf plot:StemLeaf10, 2, 5, 722, 3, 4, 430, 4, 6, 6, 945, 8, 8, 952, 7, 8Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.). What would the frequency be for class 30-under 40?a) 3b) 4c) 6d) 7e) 5
Q:
Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system and orders an inspection of "each and every payroll voucher issued since January 1, 2000." Each payroll voucher was inspected and the following frequency distribution was compiled.Errors per VoucherNumber of Vouchers0-under 25002-under 44004-under 63006-under 82008-under 10100The midpoint of the first class interval is _________.a) 500b) 2c) 1.5d) 1e) 250
Q:
Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularitiesin the payroll system and orders an inspection of "each and every payroll voucher issued since January 1, 2000." Each payroll voucher was inspected and the following frequency distribution was compiled.Errors per VoucherNumber of Vouchers0-under 25002-under 44004-under 63006-under 82008-under 10100The cumulative frequency of the second class interval is _________.a) 1,500b) 500c) 900d) 1,000e) 1,200
Q:
Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system and orders an inspection of "each and every payroll voucher issued since January 1, 2000." Each payroll voucher was inspected and the following frequency distribution was compiled.Errors per VoucherNumber of Vouchers0-under 25002-under 44004-under 63006-under 82008-under 10100The relative frequency of the first class interval is _________.a) 0.50b) 0.33c) 0.40d) 0.27e) 0.67
Q:
Consider the following frequency distribution:Class IntervalFrequency100-under 200 25200-under 300 45300-under 400 30What is the midpoint of the last class interval?a) 15b) 350c) 300d) 200e) 400
Q:
Consider the following frequency distribution:Class IntervalFrequency100-under 200 25200-under 300 45300-under 400 30What is the cumulative frequency of the second class interval?a) 25b) 45c) 70d) 100e) 250
Q:
Consider the following frequency distribution:Class IntervalFrequency100-under 200 25200-under 300 45300-under 400 30What is the relative frequency of the second class interval?a) 0.45b) 0.70c) 0.30d) 0.33e) 0.50