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Author Question: A study of Brand D washing machines that failed within three years (warranty period) was 23.2. Of ... (Read 26 times)

Alygatorr01285

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on: Aug 1, 2018
A study of Brand D washing machines that failed within three years (warranty period) was 23.2. Of those that failed, 82.9 lasted over two years. What is the probability that a washer, which lasts at least two years, will still fail before the end of the warranty period?

Question 2

Explain whether the standard normal distribution or the t-distribution is employed under the following circumstances: A) Population: Not given; Sample size: 50; Population standard deviation: Given B) Population: Normal; Sample size: 16; Population standard deviation: Not given C) Population: Not given; Sample size: 40; Population standard deviation: Given D) Population: Normal; Sample size: 9; Population standard deviation: Given


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nikmaaacs

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

0.171

Answer to Question 2

Standard normal; t-distribution; Standard normal; Standard normal


Alygatorr01285

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Reply 2 on: Aug 1, 2018
Thanks for the timely response, appreciate it

tandmlomax84

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Reply 3 on: Yesterday
Excellent

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