Statistics Test Review

Airline boarding passes are marked with red stars at random to decide which passengers should have their carry-on luggage inspected.

• Biased Sample

• Unbiased Sample

A real estate agent surveys people about their housing preferences at an open house for a luxury townhouse.

• Biased Sample

• Unbiased Sample

Which interval has 400 employees?

• 33-43
• 0-10
• 77-87
• 66-76

The box-and-whisker plot displays the number of inches of snowfall last year for 14 cities. Each city had a different amount of snowfall.

What percent of the cities had more than 64 inches of snow?

• 64%

• 50%

• 75%

• 70%

What is f(90) ?

• 12

• 16

• 6

• 18

How would you describe the shape of this boxplot?

• Skewed Right

• Skewed Left

• Symmetrical

Which is NOT included in the 5-Number Summary

• Minimum

• Q3

• Median

• Mode

What was the median score?

• 39

• 50

• 55

• 16

How many cities have temperatures between 70 degrees and 99 degrees?

• 44
• 34
• 26
• 62

At a local high school, GPA's are normally distributed with a mean of 2.9 and standard deviation of 0.6. What percentage of students at the high school have a GPA between 2.3 and 3.5?

• 68%
• 99.7%
• 95%
• 84%