Math 3 10.2 Check

Find the mean of the set of data:

232, 254, 264, 274, 287, 298, 312, 342, 398

• 275

• 295.7

• 166

• 287

Find the standard deviation for the data:

232, 254, 264, 274, 287, 298,

312, 342, 398

• 295.5

• 2240.76

• 166

• 47.4

find the range of the data:

232, 254, 264, 274, 287, 298,

312, 342, 398

• 274

• 166

• 47.4

• 295.7

range: 26, 27, 28, 28, 28, 29, 30, 30, 32, 35, 35, 36

• 16

• 10

• 3.2

• 30.3

standard deviation:

26, 27, 28, 28, 28, 29, 30, 30,

32, 35, 35, 36

• 10.2

• 30.3

• 3.2

• 10

mean: 75, 73, 77, 79, 79, 74, 81, 74,

81, 74, 70, 68, 70, 72

• 3.98

• 74.8

• 15.84

• 13

mean: 75, 73, 77, 79, 79, 74, 81, 74,

81, 74, 70, 68, 70, 72

• 74.8

• 78

• 13

• 15.84

Determine the whole number of standard deviations that include all data values:

The mean hours students in your study group study

is 66.1 min and the standard deviation is 2.9 min:

62, 63, 65, 64, 64, 68, 68, 69, 72, 66.

• 1

• 3

• 2

• 4

The average daily water usage (gallons) of a family during the past 10 months is given by the data:

124 , 113, 152, 545, 150, 490, 442, 207, 124, 147. Find the mean and the standard deviation to answer the

questions below:

How many items in the data set fall within one standard deviation of the mean?

• 7

• 10

• 3

• 0

The mean number of pairs of shoes sold daily by a shoe store is 36, with a standard deviation of 3. What percent of days would you expect the store to sell from 33 to 42 pairs of shoes?

• 18.1%

• 81.5%

• 50%

• 75%