Review One Variable Statistics

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

Which restaurant has a greater IQR?

• Lucy's Steakhouse

• Gary's Grill

• They are the same

Which club has the smaller spread, less variation?

• Cruisers

• Car Hops

• Skewed Left
• Skewed Right
• Uniform
• Symmetric

Find the median of these numbers:
4, 2, 7, 4, 3

• 2

• 5

• 7

• 4

What is the interquartile range (IQR) of the data set?

• 20

• 25

• 5

• 10

How many of the students had an ACT composite score of exactly 25?

• Cannot be determined

• 6

• 7

• 9

Identify the outlier for the given data, using the formula.

23, 34, 27, 7, 30, 26, 28, 31, 34

• 7

• 23

• 31

• 34

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

• Mode

• MAD

• Standard Deviation

• IQR or Interquartile Range