One-Variable Statistics Review

The two measures of center we've study this unit are...

• Interquartile Range

• Mean Absolute Deviation

• Mean

• Median

• Standard Deviation

Interquartile Range or IQR is a measure of variability and helps determine the spread of the data.

• True

• False

If our data set is skewed to the right or left we would measure the center by calculating the...

• Mode

• Mean

• Median

• Range

If we use the mean to measure the typical value or center of the data, we would use the _________ to measure the variability.

• IQR

• Median

• Mean

• Standard Deviation

A five number summary includes the minimum, maximum, median, ________ and ___________

• Pizza

• seltzer water

• quarter 1 or Q1

• quarter 3 or Q3

Pick the definition of an outlier.

• A value that lies outside of most other values in a data set.

• A value that is the largest.

• A value that is the smallest.

• A value that occurs the most.

If outliers are removed, what changes more significantly the mean or median?

• Mean

• Median

True or False: the mean and median values of shoe sizes shown in the dot plot for Group B are almost the same.

• True

• False

In a population of five university students with GPAs of 2.5, 2.3, 1.7, 1.4, and 1.1, a sample of three students are considered. What would be the standard deviation of the resulting sampling distribution?

• 0.53

• 0.41

• 0.35

• 0.22

On a recent test, a statistics professor finds that the mean and median scores are nearly equal. Which of the following could be the distribution of test scores?

• 
• 
• 
• None of these is correct