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Author Question: The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of ... (Read 52 times)

ahriuashd

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on: Jun 24, 2018
The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of 200.
 a. Nancy Bright's SAT score was 1390 . What percentage of students have scores higher than Nancy Bright?
  b. What percentage of students score between 1100 and 1200?
  c. What are the minimum and the maximum values of the middle 87.4 of the scores?
  d. There were 165 students who scored above 1432 . How many students took the SAT?

Question 2

A descriptive measure of the strength of linear association between two variables is the
 a. coefficient of determination.
 b. slope b1 of the estimated regression line.
  c. standard error of the estimate.
 d. correlation coefficient.


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kjohnson

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

a. 1.39
b. 12.1
c. 644, 1256
d. 20,625

Answer to Question 2

d


ahriuashd

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Reply 2 on: Jun 24, 2018
Thanks for the timely response, appreciate it

xiaomengxian

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Reply 3 on: Yesterday
:D TYSM

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