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Question
A grocery store is interested in determining whether its customers are satisfied with the quality of service provided. To collect the necessary data, interviewers have been hired to stand near the store's exits and to survey customers who have the time and interest to be surveyed. This type of sampling is called:
A) systematic random sampling.
B) ratio sampling.
C) convenience sampling.
D) stratified sampling.
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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Descriptive statistical tools include graphs, charts, and numerical measures.
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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:
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B) a bar chart.
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Q:
Which of the following is true about the difference between stem and leaf diagrams and histograms?
A) There is no difference.
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D) The stem and leaf diagram shows less information than a histogram.
Q:
Which of the following is a false statement?
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In forming the classes for a frequency distribution and histogram, suppose there were a number of empty classes. You should:
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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
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Q:
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What are the major categories of statistical tools that will be covered in this course?
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A food warehouse manager plans to conduct a check on damaged packages. The warehouse covers a large area and products are spread out over the entire building. Assuming that no products are more likely to have damaged packages than any other, what statistical sampling method would be used to reduce the time and effort required to do the study?
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One of the major challenges for developing a good written questionnaire or telephone survey instrument is that:
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The most frequently used measure of central tendency is:
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Based on the empirical rule we can assume that all bell-shaped distributions have approximately 95 percent of the values within 2 standard deviations of the mean.
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Suppose the standard deviation for a given sample is known to be 20. If the data in the sample are doubled, the standard deviation will be 40.