Item2

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Item 2

Time Remaining 57 minutes 38 seconds00:57:38

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 2 160 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):

2 191 2 172 2 176 2 178 2 184 2 162 2 154 2 166 2 188

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: 2 160 and accept H1: > 2 160 when the test statistic is

(Click to select)

.

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)

H0.

d. Determine or estimate the p-value.

The p-value is

(Click to select)

.

The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness Rlecords indicate that the mean shelf life of a 4.5-litre (L) jug of chlorine is 2160 hours (90 days). As an expetiment, Holdionger was added to the chlorine to find whether it would increase the shelf life. A sample of nine jugs of chlorine had these shelf ives (in hours): At the 0.025 level, has Holdlonger increased the shelf life of the chlorine? o. What is the decision rule? (Round the final onswer to 3 decimal places.) Reject H02160 and accept H1>2160 when the test statistic is b. Compute the vatue of the test statistic. (Round the final answer to 2 decimol places) Value of the test statistic c. What is your decision regarding Ho? d. Determine or estimate the pvalue The p-yalue is