Q&A Hero

Q: Excel's __________ can be used to construct a crosstabulation. a. Chart Tools b. SUM function c. PivotTable Report d. COUNTIF function

Q: A tabular method that can be used to summarize the data on two variables simultaneously is called a. simultaneous equations b. a crosstabulation c. a histogram d. a dot plot

Q: Excel's Chart Tools does nothave a chart type for constructing a a. bar graph b. pie chart c. histogram d. stem-and-leaf display

Q: To construct a histogram using Excel's Chart Tools, choose __________ as the chart type. a. column b. pie c. scatter d. line

Q: To construct a pie chart using Excel's Chart Tools, choose __________ as the chart type. a. column b. pie c. scatter d. line

Q: To construct a bar graph using Excel's Chart Tools, choose __________ as the chart type. a. column b. pie c. scatter d. line

Q: Excel's Chart Tools can be used to construct a a. bar graph b. pie chart c. histogram d. All of these can be constructed using Excel's Chart Tools.

Q: A(n) __________ is a graph of a cumulative distribution. a. histogram b. pie chart c. stem-and-leaf display d. ogive

Q: A __________ can be used to graphically present quantitative data. a. histogram b. pie chart c. stem-and-leaf display d. both a histogram and a stem-and-leaf display are correct

Q: When using Excel to create a __________ one must edit the chart to remove the gaps between rectangles. a. scatter diagram b. bar graph c. histogram d. pie chart

Q: A common graphical presentation of quantitative data is a a. histogram b. bar graph c. relative frequency d. pie chart

Q: A graphical presentation of a frequency distribution, relative frequency distribution, or percent frequency distribution of quantitative data constructed by placing the class intervals on the horizontal axis and the frequencies on the vertical axis is a a. histogram b. bar graph c. stem-and-leaf display d. pie chart

Q: Excel's __________ can be used to construct a frequency distribution for quantitative data. a. COUNTIF function b. SUM function c. PivotTable Report d. AVERAGE function

Q: The total number of data items with a value less than or equal to the upper limit for the class is given by the a. frequency distribution b. relative frequency distribution c. cumulative frequency distribution d. cumulative relative frequency distribution

Q: Methods that use simple arithmetic and easy-to-draw graphs to summarize data quickly are called a. exploratory data analysis b. relative frequency distributions c. bar graphs d. pie charts

Q: Fifteen percent of the students in a School of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical device(s) that can be used to present these data is (are) a. a line graph b. only a bar graph c. only a pie chart d. both a bar graph and a pie chart

Q: Categorical data can be graphically represented by using a(n) a. histogram b. frequency polygon c. ogive d. bar graph

Q: A graphical device for presenting categorical data summaries based on subdivision of a circle into sectors that correspond to the relative frequency for each class is a a. histogram b. stem-and-leaf display c. pie chart d. bar graph

Q: A graphical device for depicting categorical data that have been summarized in a frequency distribution, relative frequency distribution, or percent frequency distribution is a(n) a. histogram b. stem-and-leaf display c. ogive d. bar graph

Q: Refer to Exhibit 2-3. The cumulative frequency for the class of 11 15 a. is 200 b. is 14 c. is 199 d. is 1

Q: Refer to Exhibit 2-3. The cumulative percent frequency for the class of 16 20 is a. 100% b. 65% c. 92.5% d. 0.5%

Q: Refer to Exhibit 2-3. The percentage of workers who took 0 - 5 sick days per month wasa. 20%b. 120%c. 75%d. 60%

Q: Refer to Exhibit 2-3. The cumulative relative frequency for the class of 11 15 a. is 199 b. is 0.07 c. is 1 d. is 0.995

Q: Refer to Exhibit 2-3. The relative frequency of workers who took 10 or fewer sick days a. was 185 b. was 0.925 c. was 93 d. was 15

Q: Refer to Exhibit 2-3. The number of workers who took at least 11 sick days per month a. was 15 b. was 200 c. was 185 d. was 65

Q: Refer to Exhibit 2-3. The number of workers who took more than 10 sick days per month a. was 15 b. was 200 c. was 185 d. was 65

Q: Refer to Exhibit 2-3. The number of workers who took at most 10 sick days per month a. was 15 b. was 200 c. was 185 d. was 65

Q: Refer to Exhibit 2-3. The number of workers who took less than 11 sick days per month a. was 15 b. was 200 c. was 185 d. was 65

Q: Refer to Exhibit 2-3. The midpoint of the first class is a. 10 b. 2 c. 2.5 d. 3

Q: Exhibit 2-3The number of sick days taken (per month) by 200 factory workers is summarized below.Number of DaysFrequency0 - 51206 - 106511 - 151416 - 201Refer to Exhibit 2-3. The class width for this distributiona. is 5b. is 6c. is 20, which is: the largest value minus the smallest value or 20 -0 = 20d. varies from class to class

Q: Refer to Exhibit 2-2. The percent frequency of industries that are classified as electronics isa. 10b. 20c. 0.10d. 0.20

Q: Refer to Exhibit 2-2. The relative frequency of industries that are classified as banking is a. 7 b. 0.07 c. 0.70 d. 0.14

Q: Exhibit 2-2Information on the type of industry is provided for a sample of 50 Fortune 500 companies.Industry TypeFrequencyBanking7Consumer Products15Electronics10Retail18Refer to Exhibit 2-2. The number of industries that are classified as retail isa. 32b. 18c. 0.36d. 36%

Q: Refer to Exhibit 2-1. The percentage of students who work at least 10 hours per week isa. 50%b. 5%c. 95%d. 100%

Q: Refer to Exhibit 2-1. If a cumulative frequency distribution is developed for the above data, the last class will have a cumulative frequency ofa. 100b. 1c. 30 - 39d. 400

Q: Refer to Exhibit 2-1. The cumulative frequency for the class of 20 29 a. is 200 b. is 300 c. is 0.75 d. is 0.50

Q: Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30 39 is a. 100% b. 75% c. 50% d. 25%

Q: Refer to Exhibit 2-1. The percentage of students working 19 hours or less is a. 20% b. 25% c. 75% d. 80%

Q: Refer to Exhibit 2-1. The percentage of students working 10 19 hours is a. 20% b. 25% c. 75% d. 80%

Q: Refer to Exhibit 2-1. The cumulative relative frequency for the class of 20 29 a. is 300 b. is 0.25 c. is 0.75 d. is 0.5

Q: Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less a. is 20 b. is 100 c. is 0.95 d. 0.05

Q: Refer to Exhibit 2-1. The number of students working 19 hours or less a. is 80 b. is 100 c. is 180 d. is 300

Q: Refer to Exhibit 2-1. The midpoint of the last class is a. 50 b. 34 c. 35 d. 34.5

Q: Exhibit 2-1The numbers of hours worked (per week) by 400 statistics students are shown below.Number of hoursFrequency0 - 92010 -198020 - 2920030 - 39100Refer to Exhibit 2-1. The class width for this distributiona. is 9b. is 10c. is 39, which is: the largest value minus the smallest value or 39 0 = 39d. varies from class to class

Q: The difference between the lower class limits of adjacent classes provides thea. number of classesb. class limitsc. class midpointd. class width

Q: In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to a. one b. 100 c. the total number of elements in the data set d. None of the other answers are correct.

Q: In a cumulative relative frequency distribution, the last class will have a cumulative relative frequency equal to a. one b. zero c. 100 d. None of the other answers are correct.

Q: In a cumulative frequency distribution, the last class will always have a cumulative frequency equal to a. one b. 100% c. the total number of elements in the data set d. None of the other answers are correct.

Q: The sum of the percent frequencies for all classes will always equal a. one b. the number of classes c. the number of items in the study d. 100

Q: The percent frequency of a class is computed by a. multiplying the relative frequency by 10 b. dividing the relative frequency by 100 c. multiplying the relative frequency by 100 d. adding 100 to the relative frequency

Q: A tabular summary of data showing the percentage of items in each of several nonoverlapping classes is a a. frequency distribution b. relative frequency distribution c. percent frequency distribution d. cumulative percent frequency distribution

Q: The sum of the relative frequencies for all classes will always equal a. the sample size b. the number of classes c. one d. 100

Q: The relative frequency of a class is computed by a. dividing the midpoint of the class by the sample size. b. dividing the frequency of the class by the midpoint. c. dividing the sample size by the frequency of the class. d. dividing the frequency of the class by the sample size.

Q: A tabular summary of a set of data showing the fraction of the total number of items in several nonoverlapping classes is aa. frequency distribution.b. relative frequency distribution.c. frequency.d. cumulative frequency distribution.

Q: Excel's __________ can be used to construct a frequency distribution for categorical data. a. DISTRIBUTION function b. SUM function c. FREQUENCY function d. COUNTIF function

Q: If several frequency distributions are constructed from the same data set, the distribution with the widest class width will have the a. fewest classes b. most classes c. same number of classes as the other distributions since all are constructed from the same data d. None of the other answers are correct.

Q: In constructing a frequency distribution, as the number of classes are decreased, the class width a. decreases b. remains unchanged c. increases d. can increase or decrease depending on the data values

Q: The sum of frequencies for all classes will always equal a. 1 b. the number of elements in the data set c. the number of classes d. a value between 0 and 1

Q: A frequency distribution is a. a tabular summary of a set of data showing the fraction of items in each of several nonoverlapping classes b. a graphical form of representing data c. a tabular summary of a set of data showing the number of items in each of several nonoverlapping classes d. a graphical device for presenting categorical data

Q: The ages of employees at a company represent a. categorical data b. quantitative data c. label data d. longevity data

Q: Data that indicate how much or how many are know as a. categorical data b. quantitative data c. label data d. counter data

Q: A researcher is gathering data from four geographical areas designated: South = 1; North = 2; East = 3; West = 4. The designated geographical regions represent a. categorical data b. quantitative data c. label data d. either categorical or quantitative data

Q: Data that provide labels or names for categories of like items are known as a. categorical data b. quantitative data c. label data d. indicator data

Q: The proper way to construct a stem-and-leaf display for the data set {62, 67, 68, 73, 73, 79, 91, 94, 95, 97} is toa. exclude a stem labeled ‘8’b. include a stem labeled ‘8’ and enter no leaves on the stemc. include a stem labeled ‘(8)’ and enter no leaves on the stemd. include a stem labeled '8' and enter one leaf value of ‘0’ on the stem

Q: A graphical method that can be used to show both the rank order and shape of a data set simultaneously is a a. relative frequency distribution b. pie chart c. stem-and-leaf display d. pivot table

Q: In a stem-and-leaf display, a. a single digit is used to define each stem, and a single digit is used to define each leaf b. a single digit is used to define each stem, and one or more digits are used to define each leaf c. one or more digits are used to define each stem, and a single digit is used to define each leaf d. one or more digits are used to define each stem, and one or more digits are used to define each leaf

Q: Which of the following graphical methods is most appropriate for qualitative data? a. ogive b. pie chart c. histogram d. scatter diagram

Q: The minimum number of variables represented in a histogram is a. one b. two c. three d. four

Q: The minimum number of variables represented in a bar graph is a. one b. two c. three d. four

Q: Suppose the current weather report for your area contains the following information. Specify the measurement scale for each of the variables.Temperature84oWind Speed10 mphWind Direction(from the) SouthSky DescriptionSunnyMolds LevelHigh

Q: Laura Naples, Manager of Heritage Inn, periodically collects and tabulates information about a sample of the hotel's overnight guests. This information aids her in planning and scheduling decisions she must make. The table below lists data on ten randomly selected hotel registrants, collected as the registrants checked out. The data listed for each registrant are: number of people in the group; birth date of person registering; shuttle service used, yes or no; total telephone charges incurred; and reason for stay, business or personal.Name of RegistrantPeople In GroupBirth Date (mm/dd/yy)Shuttle UsedTelephone ChargesReason For StayAdam Sandler105/07/59yes$0.00personalMica Pepper411/23/48no12.46businessClaude Shepler204/30/73no1.20businessAmy Rodriquez212/16/71no2.90businessTony DiMarco105/09/39yes0.00personalAmy Franklin309/14/69yes4.65businessTammy Roberts204/22/66no9.35personalEd Blackstone510/28/54yes2.10personalMary Silverman111/12/49no1.85businessTodd Atherton201/30/62no5.80businessa. How many elements are there in the data set?b. How many variables are there in the data set?c. How many observations are there in the data set?d.What are the observations for the second element listed?e. What is the total number of measurements in the data set?f. Which variables are quantitative?g. Which variables are qualitative?h. What is the scale of measurement for each of the variables?i. Does the data set represent cross-sectional or times series data?j. Does the data set represent an experimental or an observational study?

Q: Michael, Inc., a manufacturer of electric guitars, is a small firm with 50 employees. The table below shows the hourly wage distribution of the employees.Hourly Wages (In Dollars)Number of Employees10 - 13814 - 171218 - 212022 - 2510a. How many employees receive hourly wages of at least $18?b. What percentage of the employees has hourly wages of at least $18?c. What percentage of the employees has hourly wages of less than $14?

Q: The following table shows the starting salaries of a sample of recent business graduates.Income (In $1,000s)Number of Graduates15 - 194020 - 246025 - 298030 - 341835 - 392a. What percentage of graduates in the sample had starting salaries of at least $30,000?b. Of the graduates in the sample, what percentage had starting salaries of less than $25,000?c. Based on this sample, what percentage of all business graduates do you estimate to have starting salaries of at least $20,000?

Q: A polling organization conducts a telephone poll of 850 registered voters and asks which candidate they will vote for in the upcoming presidential election. Forty-three percent of the respondents prefer candidate A and 45% prefer candidate B.a. What is the population being studied?b. What is the sample being studied?c. Based on the sample, what percentage of the population do you think would vote for candidate B?

Q: A pharmaceutical company is performing clinical trials on a new drug that is intended to relieve symptoms for allergy sufferers. Twelve percent of the 300 clinical trial participants experienced the side effect dry mouth.a. What is the population being studied?b. What is the sample being studied?c. Based on the sample, what percentage of the population do you think would suffer from dry mouth?

Q: A recent issue of a national magazine reported that in a national public opinion survey conducted among 2,000 individuals, 56% were in favor of gun control, 40% opposed gun control, and 4% had no opinion on the subject.a. What is the sample in this survey?b. Based on the sample, what percentage of the population would you think is in favor of gun control?c. Based on the sample, what percentage of the population would you think have no opinion on the subject?

Q: The following data shows the yearly income distribution of a sample of 200 employees at MNM, Inc.Yearly Income ($1000s)Number of Employees20 - 24225 - 294830 - 346035 - 398040 - 4410a. What percentage of employees has yearly incomes of more than $35,000?b. Is the figure (percentage) that you computed in Part a an example of statistical inference? If no, what kind of statistics does it represent?c. Based on this sample, the president of the company said that "45% of all our employees' yearly incomes are over $35,000." The president's statement represents what kind of statistics?d. With the statement made in Part c, can we be assured that more than 45% of all employees' yearly incomes are at least $35,000? Explain.e. What percentage of employees of the sample has yearly incomes of $29,000 or less?f. How many variables are presented in the above data set?g. The above data set represents the results of how many observations?

Q: A magazine surveys a sample of its subscribers every year. Some of the responses are shown below.YearPercent FemaleAverage AgeAverage Annual Household Income ($1000)19965.835.24019978.635.84219987.333.94119999.235.34320009.836.646a. How many variables are in the data set?b. Name the scale of measurement for each variable.c. Which of the above (Year, Percent Female, Average Age, Average Annual Household Income) are categorical and which are quantitative?d. Are the data time series or cross-sectional?

Q: A magazine surveyed a sample of its subscribers. Some of the responses from the survey are shown below.Subscriber IDSexAgeAnnual Household Income ($1000)0006F22454798M21532291F33824988M3830a. How many elements are in the data set?b. How many variables are in the data set?c. How many observations are in the data set?d. Name the scale of measurement for each of the variables.e. Which of the above (Sex, Age, Annual Household Income) are categorical and which are quantitative?f. Are the data time series or cross-sectional?

Q: The following shows the temperatures (high, low) and weather conditions in a given Sunday for some selected world cities. For the weather conditions, the following notations are used: c = clear; cl = cloudy; sh = showers; pc = partly cloudy.CityHiLoConditionAcapulco9977pcBangkok9278pcMexico City7757shMontreal7256pcParis7758cRome8868clToronto7861ca. How many elements are in this data set?b. How many variables are in this data set?c. How many observations are in this data set?d. Name the scale of measurement for each of the variables.e. Name the variables and indicate whether they are categorical or quantitative.f. For which variables are arithmetic operations appropriate and for which are they not appropriate?