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Author Question: In order to estimate the average daily down time, a manufacturer randomly samples 40 days of ... (Read 102 times)

rosent76

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In order to estimate the average daily down time, a manufacturer randomly samples 40 days of production records and found a mean of 55.576 minutes and standard deviation of 77.9 minutes. An 80 confidence interval is:
 a. 55.675  1.28(12.32).
  b. 55.675  1.304(12.32).
  c. 55.675  1.28(77.9).
  d. 55.675  1.304(77.9).

Question 2

The t-distribution approaches the normal distribution as the:
 a. degrees of freedom increase.
  b. degrees of freedom decrease.
  c. sample size decreases.
  d. population size increases.



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sarahccccc

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Answer to Question 1

B

Answer to Question 2

A




rosent76

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


hramirez205

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Reply 3 on: Yesterday
:D TYSM

 

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