Find the 90 confidence interval fo the mean. does the, Ask an Expert

Statistics

For each question, perform each of the following steps:

a. state the hypotheses and identify the claim.
b. find the critical values
c. compute the test value
d. Make the decision.
e. summarize the results

Charter bus records show that in the past years, buses carried an average of 42 people per trip to Niagara Falls. The standard deviation of the population in the past was found to be 8. This year, the avverage of 10 trips showed a mean of 48 people booked. Assume that the variable is normally distributed.

a. can one reject the claim, at a = 0.10, that the average is still the same?

b. Find the 90% confidence interval fo the mean.

c. Does the confidence interval interpretation agree with the hypothesis testing results? Explain.

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Category:- Statistics and Probability
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