Unit 16 Test

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

The average score on the exam was approximately?

• 10
• 75
• 85
• 95

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

Approximately 95% of the class scored between?

• 55 and 95
• 0 and 95
• 45 and 100
• 65 and 85

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

Approximately what percent of the students scored between 65 and 75?

• 10%
• 34%
• 68%
• 95%

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

The number of students scoring 75 or more is approximately?

• 75
• 83
• 125
• 158

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

Peter’s score on the exam places him in the 16^th percentile of the class. Peter’s score on the exam is approximately?

• 16
• 45
• 55
• 65

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

Carol scored 85 points on the exam. In approximately what percentile does this score place her?

• 34th
• 68th
• 84th
• 95th

Tags

CCSS.HSF-LE.A.1B

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

A z-value of 1.8 corresponds to a test score of?

• 18
• 57
• 76.8
• 93

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

A score of 95 corresponds to a standardized value (z-value) of?

• -2
• 2
• 8.5
• 20

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

A score of 60 corresponds to a standardized value (z-value) of?

• -5
• -1.5
• 1.5
• 5

250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center μ = 75 and standard deviation σ = 10.

Approximately what percentage of test scores had standardized values between -3 and 3?

• 50%
• 68%
• 95%
• 99%