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Author Question: If all the points of a scatter diagram lie on the least squares regression line, then the ... (Read 90 times)

aabwk4

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on: Jun 24, 2018
If all the points of a scatter diagram lie on the least squares regression line, then the coefficient of determination for these variables based on these data
 a. is 0.
  b. is 1.
  c. is either 1 or -1, depending upon whether the relationship is positive or negative.
  d. could be any value between -1 and 1.

Question 2

The salaries at a corporation are normally distributed with an average salary of 19,000 and a standard deviation of 4,000.
 a. What is the probability that an employee will have a salary between 12,520 and 13,480?
  b. What is the probability that an employee will have a salary more than 11,880?
  c. What is the probability that an employee will have a salary less than 28,440?


wergv

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

b

Answer to Question 2

a. 0.0312
b. 0.9625
c. 0.9909


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aabwk4

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Reply #2 on: Jun 24, 2018
Thank you :)


wergv

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Reply #3 on: Jun 24, 2018
Happy to help you


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