jawz

Which one of the following alternatives best describes the primary use of descriptive statistics? Descriptive statistics are used to:

A) obtain data about the characteristics of any data set that can be used to assess the likelihood of the occurrence of future events.

B) arrive at estimates regarding a large set of data regarding the statistical characteristics of a smaller sample.

C) summarize important characteristics of large data sets.

---

Descriptive statistics are used mainly to summarize important characteristics of large data sets.

jawz

Which one of the following alternatives best describes the primary use of inferential statistics? Inferential statistics are used to:

A) summarize the important characteristics of a large data set based on statistical characteristics of a smaller sample.

B) make forecasts, estimates or judgments about a large set of data based on statistical characteristics of a smaller sample.

C) make forecasts based on large data sets.

---

Inferential statistics are used mainly to make forecasts, estimates or judgements about a large set of data based on statistical characteristics of a smaller set of data.

jawz

A summary measure that is computed to describe a population characteristic from a sample is called a:

A) census.

B) parameter.

C) statistic.

---

When sampling from a portion of the population, you compute a statistic to make inferences about the population.

jawz

Which of the following statements about statistical concepts is least accurate?

A) A frequency distribution is a tabular display of data summarized into a relatively small number of intervals.

B) A sample contains all members of a specified group, but a population contains only a subset.

C) A parameter is any descriptive measure of a population characteristic.

---

A population is defined as all members of a specified group, but a sample is a subset of a population.

jawz

Which of the following statements regarding the terms population and sample is least accurate?

A) A sample includes all members of a specified group.

B) A sample's characteristics are attributed to the population as a whole.

C) A descriptive measure of a sample is called a statistic.

---

A population includes all members of a specified group. A sample is a portion, or subset of the population of interest.

jawz

Which measure of scale has a true zero point as the origin?

A) Nominal scale.

B) Ordinal scale.

C) Ratio scale.

---

Ratio scales are the strongest level of measurement; they quantify differences in the size of data and have a true zero point as the origin.