Q4. Which of the following is an example of a parameter?

A)   Sample standard deviation.

B)   Population variance.

C)   Sample mean.

Q5. A summary measure of a characteristic of an entire population is called a:

A)   statistic.

B)   parameter.

C)   census.

Q6. Which of the following statements regarding frequency distributions is least accurate? Frequency distributions:

A)   summarize data into a relatively small number of intervals.

B)   work with all types of measurement scales.

C)   organize data into overlapping groups.

答案和详解如下：

Q4. Which of the following is an example of a parameter?

A)   Sample standard deviation.

B)   Population variance.

C)   Sample mean.

Correct answer is B)

A parameter is any descriptive measure of a population characteristic. The population variance describes a population while the sample standard deviation and sample mean are each descriptive measures of samples.

Q5. A summary measure of a characteristic of an entire population is called a:

A)   statistic.

B)   parameter.

C)   census.

Correct answer is B)

A parameter measures a characteristic of the underlying population.

Q6. Which of the following statements regarding frequency distributions is least accurate? Frequency distributions:

A)   summarize data into a relatively small number of intervals.

B)   work with all types of measurement scales.

C)   organize data into overlapping groups.

Correct answer is C)

Data in a frequency distribution must belong to only one group or interval. Intervals are mutually exclusive and non-overlapping.

答案和详解如下：

Q4. Which of the following is an example of a parameter?

A)   Sample standard deviation.

B)   Population variance.

C)   Sample mean.

Correct answer is B)

A parameter is any descriptive measure of a population characteristic. The population variance describes a population while the sample standard deviation and sample mean are each descriptive measures of samples.

Q5. A summary measure of a characteristic of an entire population is called a:

A)   statistic.

B)   parameter.

C)   census.

Correct answer is B)

A parameter measures a characteristic of the underlying population.

Q6. Which of the following statements regarding frequency distributions is least accurate? Frequency distributions:

A)   summarize data into a relatively small number of intervals.

B)   work with all types of measurement scales.

C)   organize data into overlapping groups.

Correct answer is C)

Data in a frequency distribution must belong to only one group or interval. Intervals are mutually exclusive and non-overlapping.

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