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Author Question: A local rental car agency has 100 cars. The rental rate for the winter months is 60. Find the ... (Read 234 times)

savannahhooper

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on: Jul 25, 2018
A local rental car agency has 100 cars. The rental rate for the winter months is 60. Find the probability that in a given winter month at least 70 cars will be rented. Use the normal distribution to approximate the binomial distribution.
 
  Round the standard deviation to three decimal places to work the problem.

Question 2

A researcher wishes to test whether the rate of defectives among computers from manufacturer A differs from the rate of defectives among computers from manufacturer B.
 
  She selects two independent random samples and finds that 1.5 of 200 computers from manufacturer A are defective and 3.5 of 400 computers from manufacturer B are defective.
  Are the conditions and assumptions for inference with the two-proportion z-test satisfied? Explain your answer.


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TheDev123

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Reply #1 on: Jul 25, 2018
Answer to Question 1

P(x  69.

Answer to Question 2

The assumptions and conditions necessary for inference are not satisfied. There are only 3 defectives from manufacturer A . This violates the condition which requires that at least 5 successes and at least 5 failures be observed in each sample.


savannahhooper

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Reply #2 on: Jul 25, 2018
TY


TheDev123

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Reply #3 on: Jul 25, 2018
You're welcome


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