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Century Business Products tested 180 white board markers that they had in stock and found that 13 failed to

Question

Century Business Products tested 180 white board markers that they had in stock and found that 13 failed to

perform adequately and had to be replaced immediately. The same test was applied to a sample of 67 white board markers from a new supplier and found that 7 of those failed.

a. State the decision rule for 0.05 significance level: H0: p1 – p2 ≥ 0; H1: p1 – p2 0. (Negative answer should be indicated by a minus sign. Round the final answer to 3 decimal places.)

Reject H0 if z .

b. Compute the pooled proportion. (Round the final answer to 3 decimal places.)

pc

c. Compute the value of the test statistic. (Negative answer should be indicated by a minus sign. Round the final answer to 3 decimal places.)

Value of the test statistic

d. Use the 0.05 significance level to test if it is reasonable to conclude that the white board markers from the new supplier are not performing as well as those in stock.

(Click to select)

Do not reject

Reject

H0. There is

(Click to select)

not enough

enough

evidence to conclude that the white board markers from the new supplier are not performing as well as those in stock.

Ne

Statistics and Probability