7 Descriptive Statistics Online Quiz Questions

True or false: Descriptive statistics alone can establish why a pattern occurred.

A manager wants to compare the counts of responses in several product-type categories. Which display is suitable?

In a survey of 30 valid responses, 12 are in the “Online” category. What is the relative frequency as a percentage?

Which measure of center uses every numerical observation and can be pulled toward an unusually high or low value?

True or false: For an even number of numerical observations, the median is the mean of the two middle values after the data are sorted.

Which spreadsheet function counts observations that meet multiple criteria?

Before summarizing a spreadsheet of customer categories, which checks are appropriate? Select all that apply.

For the data $12, 14, 14, 15, 20$, what is the range?

A numerical data set is strongly skewed and includes an extreme value. Select all measures that are generally suitable for summarizing its center and spread.

For a data set with $Q_1=10$ and $Q_3=18$, what is the interquartile range?

A team has 40 recorded repair times, several unusually long delays, and some blank cells. Outline a defensible descriptive analysis: explain how to approach the blanks, which measures of center and spread to report, which display to inspect, and one limitation on the conclusions.

A survey has 30 valid responses, and 12 respondents selected “Online.” What percentage of valid responses selected “Online”? Enter the numerical percentage value without the percent sign.

A researcher wants to inspect the shape and possible clusters in a set of numerical measurements. Which display is most suitable?

When checking numerical data, missing entries should not be silently treated as zero.

A data set contains the observations $12, 14, 14, 15, 20$. What is its range?

A spreadsheet contains sales records. You need to count records where the region is “North” and the product type is “Basic.” Which function is designed for counting observations that meet both criteria?

A survey spreadsheet contains responses labeled both “Online” and “online,” but they are intended to represent the same category. What should be done before calculating category frequencies?

Before summarizing a spreadsheet column of measured quantities, you discover that some entries that look like numbers may be stored as text. What is the most appropriate next step?