Unit 10 Practice Quiz

What is the approximate sample standard deviation of the following data set? 25, 22, 29, 30, 22, 24, 31, 32, 23, 35, 20, 27

• 26

• 26.7

• 4.7

• 4.5

What statistical measure quantifies the amount of variation or dispersion in a set of data values? Choose all that apply.

• median

• range

• standard deviation

• interquartile range

A dataset has a mean of 25.8 and a standard deviation of 4.3. Which interval below will contain the typical values in the data set?

• 15.8 to 35.8

• 17.2 to 34.4

• 21.5 to 30.1

• 18.6 to 33.0

Two sets of data, each consisting of 250 points, are illustrated below. Which of the following statements is false when comparing the two sets?

• Set B seems more symmetrical than Set A.

• Set A has a larger range than Set B.

• Set B shows more variability than Set A because its mean is higher.

• The interquartile ranges for both sets are almost identical.

What is the mean number of books read?

What is the median number of books read?

What is the sample standard deviation for the number of books read?

What is the first quartile for the number of books read?

What is the third quartile for the number of books read?

Both batters have the same average distance. Which one has a greater standard deviation?

• Batter A

• Batter B

• They have about the same standard deviation