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Author Question: Verbal SAT scores have approximately a normal distribution with mean equal to 500 and standard ... (Read 126 times)

Shelles

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on: Jul 24, 2018
Verbal SAT scores have approximately a normal distribution with mean equal to 500 and standard deviation equal to 100 . The 95th percentile of z-scores is z = 1.65 . What is the 95th percentile of verbal SAT scores?
 a. 335
  b. 500
  c. 600
  d. 665

Question 2

In a past General Social Survey, responses to the question Have you ever been beaten or punched by another person gave the following 95 confidence intervals for the population proportions of women and men who would say yes as 0.195 to 0.265 and 0.493 to 0.587, respectively. The sample sizes for men and women were large (444 men and 591 women). Is it reasonable to conclude that there is a difference in the population between men and women in the proportion that have ever been beaten or punched by another person?


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kaylee05

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Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

Yes, because the two intervals do not overlap.


Shelles

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Reply #2 on: Jul 24, 2018
Thank you!


kaylee05

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Reply #3 on: Jul 24, 2018
Always glad to help...


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