Stat Final

What is the IQR of the Cruisers?

• 4

• 6

• 13

• 9

What is the range of the data shown?

• 85

• 90

• 80

• 70

The larger your confidence interval is, the more sure (higher confidence level) you can be.

• True

• False

__________ is the largest score minus the smallest score.

• Standard deviation

• The range

• Mean deviation

the symbol shows _____________

• Standard Deviation

• Mean Deviation

Which of the following correct sequence steps was used to calculate the sample variance?

• I,II,V,IV,III

• I,II,III,V,IV

• I,II,IV,V,III

Find the variance and standard deviation of the following sample data

(5, 17, 12, 10)

• 11

• 11.5

• 15

• 15.5

________of a set of numbers X₁, X₂, …X_n is usually denoted by

• The mode

• The median

• The mean

Calculate the relative frequency of having an IQ score in the 131-140 range. (200 7th graders were surveyed).

• 8%

• 4%

• 20%

• 15.5%

Calculate the 5 number summary for the following data. You may use your graphing calculator.

• 1791, 3162, 6163, 8578, 9400

• 1791, 3815, 6472, 8924.5, 9400

• 6197.44

• 7609