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Exam 1: Data and Statistics

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Question 41

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The Department of Transportation of a city has noted that on the average there are 14 accidents per day. The average number of accidents is an example of

A) descriptive statistics
B) statistical inference
C) a sample
D) a population

E) All of the above
F) C) and D)

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Question 42

Multiple Choice

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A Scanner Data User Survey of 50 companies found that the average amount spent on scanner data per category of consumer goods was $387,325 (Mercer Management Consulting, Inc., April 24, 1997) . The $387,325 is an example of

A) categorical data
B) quantitative data
C) a descriptive statistic
D) Both quantitative data and a descriptive statistic are correct.

E) None of the above
F) All of the above

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Question 43

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Which of the following is NOT an example of a firm that sells or leases business database services to clients?

Since a sample is a subset of the population, the sample mean

In a questionnaire, respondents are asked to mark their gender as male or female. Gender is an example of a

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?

Categorical data use either the ______ or ______ scale of measurement.

In a questionnaire, respondents are asked to record their age in years. Age is an example of a

Suppose the current weather report for your area contains the following information. Specify the measurement scale for each of the variables.

The set of measurements collected for a particular element is (are) called

Which of the following is an example of categorical data?

__________ is a spreadsheet package.

The most common type of observational study is

Exhibit 1-2 In a sample of 3,200 registered voters, 1,440, or 45%, approve of the way the President is doing his job. -Refer to Exhibit 1-2. The 45% approval is an example of

The following data shows the yearly income distribution of a sample of 200 employees at MNM, Inc. a.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?

The entities on which data are collected are

Categorical data

Data collected at the same, or approximately the same, point in time are

Statistical inference

Exhibit 1-1 In a recent study based upon an inspection of 200 homes in Daisy City, 120 were found to violate one or more city codes. -Refer to Exhibit 1-1. The manager's statement that 60% of Daisy City's 3,000 homes are in violation of city codes is