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Exam 1: Data and Statistics

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Question 51

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The following national weather report gives the temperatures and weather conditions on the previous day in cities across the nation. City Hi Lo Condition Albany, N.Y. 88 60 cloudy Chicago 92 64 clear Dallas-Ft.Worth 89 72 cloudy Denver 75 54 clear Hartford 88 61 cloudy Honolulu 86 70 clear Kansas City 93 74 clear Los Angeles 80 62 cloudy Nashville 94 72 rain New York City 90 69 rain Philadelphia 90 67 rain a.How many elements are in this data set? b.How many variables are in this data set? c.How many observations are there in the above data set? d.Which variables are categorical and which are quantitative? e. What measurement scale is used for temperature and weather conditions?

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a.11
b.3
c.11
d.Temperature is...

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Question 52

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Temperature is an example of a variable that uses

A) the ratio scale
B) the interval scale
C) the ordinal scale
D) either the ratio or the ordinal scale

E) None of the above
F) A) and B)

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Question 53

Multiple Choice

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Which of the following variables use the ratio scale of measurement?

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?

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

Which of the following is a scale of measurement?

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

The sample size

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. a.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?

The scale of measurement that is used to rank order the observation for a variable is called the

A statistics professor asked students in a class their ages. On the basis of this information, the professor states that the average age of all the students in the university is 24 years. This is an example of

Exhibit 1-3 Part of the data bank of a corporation is shown below. -Refer to Exhibit 1-3. Years of Experience is an example of ________ data.

The subject of data mining deals with

In Excel, a worksheet that displays the formulas used to create the results is a

The following information regarding the top eight Fortune 500 companies was presented in an issue of Fortune Magazine. a.How many elements are in the above data set? b.How many variables are in this data set? c.How many observations are in this data set? d.Which variables are categorical and which are quantitative variables? e. What measurement scale is used for each variable?

Statistical inference

Which scale of measurement can be either numeric or nonnumeric?

Exhibit 1-3 Part of the data bank of a corporation is shown below. -Refer to Exhibit 1-3. Yearly Salary is an example of ________ data.

The following information regarding the ten richest Americans was reported in a recent issue of Forbes. a.How many elements are in the above data set? b.How many variables are in this data set? c.How many observations are in this data set? d.Which variables are categorical and which are quantitative? e. What measurement scale is used for each variable?

Ordinary arithmetic operations are meaningful