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Author Question: The scores on a certain test are normally distributed with a mean score of 63 and a standard ... (Read 107 times)

BRWH

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on: Aug 2, 2018
The scores on a certain test are normally distributed with a mean score of 63 and a standard deviation of 2. What is the probability that a sample of 90 students will have a mean score of at least 63.2108?
 
  A) 0.3413 B) 0.3174 C) 0.1587 D) 0.8413

Question 2

The purpose of a linear regression line is to .
 
  a. predict one set of scores from another set
  b. display the bivariate distribution of X and Y
  c. identify the mean of the X and Y variables
  d. calculate the correlation coefficient


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atrochim

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Reply #1 on: Aug 2, 2018
Answer to Question 1

C

Answer to Question 2

A


BRWH

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Reply 2 on: Aug 2, 2018
Gracias!

bblaney

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Reply 3 on: Yesterday
Wow, this really help

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