Measures of Central Tendency and Variability Vocabulary

Which of the following statements is true about the Rizalyn’s scores in her subject areas?

• She has more consistent scores in Math than English

• She has more consistent scores in Science than Math

• She has more consistent score in Science than English

• She has more consistent score in Math than Science

If test scores for a class are: 100, 100, 90, 90, 80, 80, 70, 70, 60, and 60, what are the mean and sample standard deviation?

• mean = 80, stdev = 14.9

• mean = 70, stdev = 14.9

• mean = 80, stdev = 13.9

• mean = 80, stdev = 12.9

• mean = 85, stdev = 14.9

The mean weight of a mouse is 0.44 lbs. with a standard deviation of 0.04 pounds. Interpret the standard deviation.

• The average mouse weights 0.48 lbs.

• The weight of a mouse is 0.04 lbs. higher than the average.

• On average, the weight of a mouse differs from 0.44 lbs. by about 0.04 lbs.

• On average, the weight of a mouse differs from 0.04 lbs. by 0.44 lbs.

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the sample standard deviation of Ervin's scores?

• 511.33

• 22.61

• 438.48

• 20.94

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

• 5

• 6

• 9

• 11

A data set can have more than one _______

• Median

• Mode

• Mean

• Midrange

What is the mode?

• 4

• 9

• 6

• 5

Which is the MIDDLE of an ordered set of data?

• Mean

• Median

• Mode

• Range

Which is a synonym for "average?"

• mean

• median

• mode

• range

If you score 76, 85, 97, and 83 on your math tests, what would your median score be? 

• 84

• 90

• 85

• 88