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Author Question: If we change a 95 confidence interval estimate to a 99 confidence interval estimate, we can expect ... (Read 180 times)

robinn137

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on: Jun 24, 2018
If we change a 95 confidence interval estimate to a 99 confidence interval estimate, we can expect the _____.
 a. width of the confidence interval to increase
  b. width of the confidence interval to decrease
  c. width of the confidence interval to remain the same
  d. sample size to increase

Question 2

The life expectancy of a particular brand of tire is normally distributed with a mean of 40,000 and a standard deviation of 5,000 miles. What is the random variable in this experiment?
 a. Life expectancy of this brand of tire
  b. Normal distribution
  c. 40,000 miles
  d. None of the answers is correct.


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cassie_ragen

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

a

Answer to Question 2

a


robinn137

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Reply 2 on: Jun 24, 2018
Wow, this really help

juliaf

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Reply 3 on: Yesterday
:D TYSM

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