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Statistics

1. Write the null and alternate hypotheses for each claim.
a) Medical doctors in Los Angeles work an average of 60 hours per week.

H0: H1:

b) The average cost of replacing auto braking devices is more than $127.

H0: H1:

2. Calculate the test statistic for the claim in #1b, using the following information.
Sample information: A random sample of 40 repairs has a sample mean price of $132.09 and a sample standard deviation of $13.58.

3. Claim: The average amount spent by shoppers at a suburban mall is less than $75.
Sample information: A sample of 37 suburban shoppers had a mean expense of $59.10 with a sample standard deviation of $31.40.

Test the claim, using α = .05. State the null and alternate hypotheses, the type of test, the model, the TS, and the p-value. State whether or not you reject the null. State a conclusion about the original claim. Do you agree with it or not?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9405081

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