Mean Median Standard Deviation

To find the _________ you add up all the numbers and then divide by how many numbers you have.

• Mean

• Median

• Mode

• Range

The term "snowstorms of note" applies to all snowfalls over 6 inches. The snowfall amounts for snowstorms of note in Utica, New York, over a four-year period are as follows: 7.1, 9.2, 8.0, 6.1, 14.4, 8.5, 6.1, 6.8, 7.7, 21.5, 6.7, 9.0, 8.4, 7.0, 11.5, 14.1, 9.5, 8.6 What are the mean and SAMPLE standard deviation for these data, to the nearest hundredth?

• mean = 9.46; standard deviation = 3.74

• mean = 9.46; standard deviation = 3.85

• mean = 9.45; standard deviation = 3.74

• mean = 9.45; standard deviation = 3.85

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

What is the sample standard deviation for the data given:

5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 6.89

• 10.1

• 7.26

• 9

Michael has taken 12 tests in his math class. His lowest test score was 78. His highest test score was 98. On the 13th test, he earned a 64. Which of the following effects are certain to occur to the standard deviation, mean, and median of Michael's test scores when the last score is added?

• The standard deviation, median, and mean all decrease.

• The standard deviation increases, mean decreases, and median cannot be determined.

• The standard deviation increases, and mean and median decrease.

• The standard deviation cannot be determined, and mean and median decrease.

Which is true?

• Mean < Median

• Mean = Median

• Mean > Median

Which is true?

• Mean < Median

• Mean = Median

• Mean > Median

All of the below sets have the same mean.

Set 1-Standard Deviation=3.1

Set 2-Standard Deviation=4.9

Set 3-Standard Deviation=1.7

Set 4-Standard Deviation=3.2

Which set of data probably has the points closest to the mean?

• 1

• 2

• 3

• 4

Which data set has the largest standard deviation?

• Set 1

• Set 2

• Set 3

• Set 4

What does this symbol represent?

• Population Standard Deviation

• Sample Standard Deviation

• Mean Absolute Deviation

• Mean