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A carpet company advertises that it will deliver your carpet within 15 days of purchase. A...

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Statistics

A carpet company advertises that it will deliver your carpetwithin 15 days of purchase. A sample of 49 past customers is taken.The average delivery time in the sample was 16.2 days. Assume thepopulation standard deviation is known to be 5.6 days.

a.

State the null and alternative hypotheses.

b.

Using a critical value, test the null hypothesis at the 5% levelof significance.

c.

Using a p-value, test the hypothesis at the 5% level ofsignificance.

d.

What type of error may have been committed for this hypothesistest?

Answer & Explanation Solved by verified expert
4.1 Ratings (495 Votes)
a null hypothesisHo 15 b for 005 level with right tailed test critical value of z 1645 Decision rule reject Ho if test statistic    See Answer
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