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Author Question: The symbol for _____ is a. sample covariance b. population covariance c. sample correlation d. ... (Read 114 times)

Deast7027

  • Hero Member
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  • Posts: 538
on: Jun 24, 2018
The symbol for _____ is  
 a. sample covariance
  b. population covariance
  c. sample correlation
  d. population correlation

Question 2

In order to estimate the average electric usage per month, a sample of 81 houses was selected and the electric usage was determined. Assume a population standard deviation of 450 kilowatt-hours. If the sample mean is 1858 kWh, the 95 confidence interval estimate of the population mean is
 a. 1760 to 1956 kWh.
   b. 1729 to 1987 kWh.
   c. 1758 to 1958 kWh.
   d. 1776 to 1940 kWh.


Eazy416

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

d

Answer to Question 2

a


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