Chapter 6 Quiz Statistics

Use the image of the normal graph provided. What percent of values are less than 46?

• 16%

• 84%

• 46%

• 12.5%

The sign of the z-score indicates whether the location is above(positive) or below(negative) the mean.

• True

• False

A data set has a mean of 290 and a standard deviation of 20. Calculate the z-score for 265.

Mrs. Morris gives a test to her Statistics class. Jorge scored an 82 on his test. He knows the standard deviation is 5, and his z-score is 0.8. What is the mean of the statistics test?

• 78

• 86

• 1.64

• 80

A data set has a mean of 20 and a standard deviation of 3. Calculate the z-score for 23.

Use the image of the normal graph provided. What is the value of the mean?

• 6

• 34

• 52

• 70

The box-and-whisker plot below shows the number of points each member of the middle school basketball team made during the game on Saturday. What was the greatest number of points scored by a basketball player during the game on Saturday?

• 4

• 6

• 7

• 8

Use the image of the normal graph provided. What is the value of the standard deviation?

• 6

• 12

• 36

• 18

What is the Mode?
  22,7,22,1,7,18,18,16,6,6,7

• 7

• 18

• 21

• 6

What is the Mean?
9, 5, 7

• 8

• 11

• 7

• 6