AP Stats Ch 2, Part 1

Estimate Q₁

• 20 m

• 25 m

• 30 m

• 40 m

Approximately what percent of distances fall at or below 50 m?

• 39%

• 80%

• 90%

• 100%

How many children does Strouth have?

• 0

• 1

• 2

• 3

• 4

Lynn is 65 inches tall. Her class's mean height is 67 inches with a standard deviation of 4.29 inches. Find her z-score.

• 2

• 0.466

• -0.466

• 15.152

Tags

CCSS.HSS.ID.A.4

On a standardized test report from 7th grade, Kendra remembered she scored at the 67th percentile on the math section. Interpret this percentile.

• 67% of those who took the test scored equal to or better than Kendra

• 67% of those who took the test scored equal to or worse than Kendra

• 67% of those who took the test scored equal to Kendra

• 67% of those who took the test scored worse than Kendra

Tags

CCSS.7.SP.B.4

Shawn calculated their z-score on the ACT and it was 0.5. Lou calculated their z-score on the SAT and it was -0.5. Which of the following statements is true?

• Lou scored equal to or worse than 50% of the students who took the test.

• Shawn scored better or equal to 50% of the students who took the test.

• Lou scored better on the SAT than Shawn scored on the ACT.

• Shawn scored better on the ACT than Lou scored on the SAT.

Tags

CCSS.HSS.ID.A.4

Terrina calculated her z-score for a recent test after the teacher provided the mean and standard deviation. It was 0.75. Interpret this z-score

• Terrina scored 0.75 standard deviations above the mean

• Terrina did as well or better than 75% of the students who took the test

• Terrina did as well or worse than 75 of the students who took the test

• Terrina scored 0.75 standard deviations below the mean.

Tags

CCSS.HSS.ID.A.4

What is true after standardizing data into z-scores.

• There is no change to the center

• The mean is 1 and the standard deviation is 0

• The mean is 0 and the standard deviation is 1

• There is no change to the range

Tags

CCSS.HSS.ID.A.4