Stats Quiz Practice

Given the following test scores, determine the range:

93, 79, 83, 89, 90, 71, 85

• 14

• 13

• 22

• 20

Given the following test scores, determine the median:

93, 79, 83, 89, 90, 71, 85

• 89

• 85

• 90

• 71

Given the following test scores, determine the mean, rounded to the nearest tenth:

93, 79, 83, 89, 90, 71, 85

• 91.3

• 87.2

• 83.0

• 84.3

Given the following test scores, determine the mode:

93, 79, 83, 89, 90, 71, 85

• 83

• 79

• 71

• This data set has no mode

Given the following frequency table if test scores, use your graphing calculator to find the standard deviation, rounded to 3 decimal places.

• x = 89.815

• Sx = 8.714

• Q1 = 80

Find the mean and standard deviation for the following set of data:

{30, 25, 15, 35, 47, 59, 55, 64}

Round your answer to 3 decimal places.

• Mean: 17.621

  S. Deviation: 16.483

• Mean: 17.621

  S. Deviation: 41.250

• Mean: 41.250

  S. Deviation: 27.500

• Mean: 41.250

  S. Deviation: 17.621

Find the upper and lower quartiles and the interquartile range for the following set of data:

{32, 37, 35, 39, 29, 42, 45, 28}

Round your answer to 3 decimal places.

• Q1: 40.5

  Q3: 30.5

  IQR: -10.5

• Q1: 30.5

  Q3: 40.5

  IQR: 10

• Q1: 30.5

  Q3: 40.5

  IQR: 45

• Q1: 28

  Q3: 45

  IQR: 17

True or False: According to this box plot, 50% of participants measured are taller than 68 inches.

• True

• False

True or False: According to this box plot, more boys are between 70 and 71 inches tall than 63 and 65 inches.

• True

• False

True or False: The interquartile range of this box and whisker plot is 5.

• True

• False