250 students in a math class take the final exam. The scores on ...

[Mr. Wonderful]

Question 1

150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean μ = 65 and standard deviation σ = 10.

The third quartile of the scores on the exam is approximately
◦ 72 points.
◦ 67 points.
◦ 80 points.
◦ 84 points.
◦ none of these

Question 2

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

The third quartile of the scores on the exam is approximately
◦ 94 points.
◦ 77 points.
◦ 90 points.
◦ 82 points.
◦ none of these

[connor417]

Answer 1

72 points.

Answer 2

82 points.

[Capo]

Question 1

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

A score of 95 corresponds to a standardized value of
◦ 8.5.
◦ 20.
◦ -2.
◦ 2.
◦ none of these

Question 2

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

A score of 60 corresponds to a standardized value of
◦ -1.5.
◦ 5.
◦ -5.
◦ 1.5.
◦ none of these

[matt]

Answer 1

2.

Answer 2

-1.5.

[abarnes]

Question 1

150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean μ = 65 and standard deviation σ = 10.

Approximately what percentage of the test scores had standardized values between -2 and 2?
◦ 50%
◦ 95%
◦ 99%
◦ 68%
◦ none of these

Question 2

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

Approximately 95% of the class scored between
◦ 55 and 95.
◦ 0 and 95.
◦ 65 and 85.
◦ 45 and 100.
◦ none of these

[bpool94]

Answer 1

95%

Answer 2

55 and 95.

[Mollykgkg]

Question 1

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

Approximately what percentage of the test scores had standardized values between -3 and 3?
◦ 50%
◦ 95%
◦ 68%
◦ 99.7%
◦ none of these

Question 2

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

Approximately how many students had test scores with standardized values between -0.675 and 1?
◦ 147
◦ 107
◦ 188
◦ 85
◦ none of these

[sokh]

Answer 1

99.7%

Answer 2

147

[Chelseaamend]

Question 1

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

Approximately how many students had test scores with standardized values between -2 and 0.675?
◦ 147
◦ 85
◦ 125
◦ 204
◦ 181

Question 2

As part of a study on the metabolism of athletes, 400 college basketball players are randomly chosen and their weights taken. The distribution of the weights is approximately normal. The average weight is 215 pounds and the standard deviation is 15 pounds.

Approximately how many players had weights with standardized values between 1 and 2?
◦ 200
◦ 54
◦ 216
◦ 108
◦ none of these

[shailee]

Answer 1

181

Answer 2

54