2.1 Lesson Quickcheck

A dataset has a mean of 50 and a standard deviation of 5. What is the z-score of a data value of 60?

• 1

• 2

• 3

• 4

In a class of 100 students, a student scored at the 85th percentile on a test. How many students scored below this student?

• 15

• 84

• 85

• 100

If a data value has a z-score of 0, what does this indicate about the data value?

• It is below the mean.

• It is above the mean.

• It is equal to the mean.

• It is an outlier.

A student scored at the 90th percentile in math and the 80th percentile in science. Which subject did the student perform better in relative to their peers?

• Math

• Science

• Both equally

• Cannot be determined

A dataset has a mean of 100 and a standard deviation of 20. What is the data value corresponding to a z-score of -1.5?

• 70

• 80

• 90

• 110

Which of the following z-scores indicates a data value that is furthest away from the mean?

• 0.5

• -1

• 2

• -3

A student has a z-score of 1.2 in English and a z-score of 0.8 in History. In which subject did the student perform better relative to the class?

• English

• History

• Both equally

• Cannot be determined

What is the percentile of the hustler who fumbled 5 bags?

n = 10

• 40th percentile

• 70th percentile

• 20th percentile

• 60th percentile

Find the Z score of the hustler who fumbled 10 bags.

• .48

• 1.32

• -.48

• -1.32