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

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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 how many students had test scores with standardized values between -0.675 and 1?
◦ 75
◦ 88
◦ 37
◦ 140
◦ none of these

Question 2

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

[Ksh22]

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