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Question
Assume that a medical research study found a correlation of -0.73 between consumption of vitamin A and the cancer rate of a particular type of cancer. This could be interpreted to mean:
A) the more vitamin A consumed, the lower a person's chances are of getting this type of cancer.
B) the less vitamin A consumed, the lower a person's chances are of getting this type of cancer.
C) the more vitamin A consumed, the higher a person's chances are of getting this type of cancer.
D) vitamin A causes this type of cancer.
Answer
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Related questions
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Data gathered from a structured interview is generally easier to analyze than data collected from an unstructured interview.
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Data collected using open-end questions is generally easier to analyze than data collected from closed-end questions.
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When an interviewer asks a specified series of questions in the course of a personal interview, he/she is conducting an unstructured interview.
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One way to improve the response rate for a survey is to administer the surveys directly to the respondents.
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An accountant has recently prepared a report for a client that contains a variety of graphs and charts. In doing so, she has used descriptive statistical methods.
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Descriptive statistics allow a decision maker to reach a conclusion about a population based on a subset from the population.
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A stem and leaf diagram is an alternative to using:
A) a pie chart.
B) a bar chart.
C) a histogram.
D) an ogive.
Q:
Which of the following is true about the difference between stem and leaf diagrams and histograms?
A) There is no difference.
B) The stem and leaf diagram shows more information by showing the individual values.
C) The histogram shows the shape center and spread of the distribution while the stem and leaf does not.
D) The stem and leaf diagram shows less information than a histogram.
Q:
Which of the following is a false statement?
A) A bar chart is usually constructed so that gaps exist between the bars.
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C) A histogram is usually constructed without gaps between the bars.
D) A bar chart and histogram can typically be used interchangeably.
Q:
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A) Quantitative data
B) Categorical data
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In forming the classes for a frequency distribution and histogram, suppose there were a number of empty classes. You should:
A) increase the class width.
B) decrease the class width.
C) keep the current class width.
D) use an ogive instead.
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A histogram is used to display which of the following characteristics for a quantitative variable?
A) The approximate center of the data
B) The spread in the data
C) The shape of the distribution
D) All of the above.
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As a member of the student council at your university, you have been assigned the task of conducting a phone survey of undergraduate students to determine satisfaction with the campus food service. Explain how you would go about selecting a simple random sample.
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Which of the following statements is true?
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A) the 30th employee.
B) employee 1 to 30 randomly selected.
C) employee 1 to 100 randomly selected.
D) the first employee.
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B) Stratified random sampling
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B) there will always be missed data.
C) bias cannot be controlled.
D) wording can influence responses.
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C) mode.
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Q:
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