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Exam 1: Statistics and Data

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Question 21

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A professor's rank (assistant,associate,and full),as well as salary,represent ordinal data.

A) True
B) False

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Question 22

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A(n) ____________ variable is characterized by infinitely uncountable values and can take any value within interval.

A) discrete
B) infinite
C) continuous
D) quantitative

E) A) and B)
F) B) and D)

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Question 23

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Population parameters are used to estimate corresponding sample statistics.

In each of the following statements,determine whether the branch of statistics is best classified as descriptive statistics or inferential statistics.The average of a data set is equal to 35.7.The minimum value of a data set is 78,and the maximum value is 146.Because the average age in a sample is 23,it is likely that the average age in the population is about 23.Because the values in the sample are so widely dispersed,the spread of the population must be high.

An undergraduate student's status (freshman,sophomore,junior,or senior) is an example of which scale of measurement?

Body weight is an example of a discrete variable.

Which of the following variables is qualitative?

Which of the following represents a population and a sample from that population?

The ordinal scale of data measurement is

Population parameters are difficult to calculate due to

The values of data on a(n) __________ scale can be categorized and ranked.

A ___________ represents all possible subjects of interest.

What is the scale of measurement of the distance between any two locations?

Both discrete and continuous variables may assume an uncountable number of values.

Which of the following variables is not continuous?

Define the measurement scale of a car's fuel efficiency (measured in miles per gallon).Is a car's fuel efficiency discrete or continuous?

Social networking sites support themselves in large part by selling advertising space.The hit rate on these ads is a critical measure when trying to solicit advertising.The hit rate is used as a measure of success for ads.How would you recommend a social networking site use sampling to evaluate its existing ads?

We would like to determine the average height of a college team of basketball players at Ohio State University.Is it necessary to take a sample of basketball players? Explain.

A population is a larger data set than its corresponding sample.

A study of teen smoking is planned.Researchers are interested in collecting data which allow them to draw conclusions about the likelihood,frequency,and longevity of teen smoking.The questions asked include: "What is your gender?","What is your age?","Do you smoke (yes or no)?","How many cigarettes per day do you smoke?","For how long have you smoked (in years)?" What is the measurement scale for each variable?