The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. Records indicate that the mean shelf life of a 4.5-litre (L) jug of chlorine is 2160 hours (90 days). As an experiment, Holdlonger was added to the chlorine to find whether it would increase the shelf life. A sample of nine jugs of chlorine had these shelf lives (in hours):

2159

2170

2180

2179

2160

2167

2171

2181

2185

At the 0.025 level, has Holdlonger increased the shelf life of the chlorine?

a. What is the decision rule? (Round the final answer to 3 decimal places.) Reject H₀ : 2160 and accept H₁ : > 2160 when the test statistic is (Click to select) less than equal to greater than .

b. Compute the value of the test statistic. (Round the final answer to 2 decimal places.) Value of the test statistic

c. What is your decision regarding H₀?

(Click to select) Fail to reject Reject H₀.

d. Determine or estimate the p-value.

The p-value is (Click to select) zero close to zero one .