Last year a company received 50 complaints concerning carpet installation. The d

Question

Last year a company received 50 complaints concerning carpet installation. The data in the accompanying table represents the number of days between the receipt of a complaint and the resolution of the complaint. Complete parts (a) through (d).

a. The supervisor claims that the mean number of days between the receipt of a complaint and the resolution of the complaint is 20 days. At the 0.05 level of significance, is there evidence that the claim is not true (that is, that the mean number of days is different from 20 )?

State the null and alternative hypotheses. Upper H 0 : mu equals 20Upper H 1 : mu not equals 20 Determine the test statistic.

The test statistic is 4.2331 . (Round to four decimal places as needed.)

Find the p-value. p-valueequals nothing (Round to four decimal places as needed.)

Explanation / Answer

Degrees of freedom = n - 1 = 50 - 1 = 49

Since this is a two tailed test.

p - Value = 2*P(t > 4.2331) = 0.0001

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