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):

217721852168219021662162215621912175

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.)

RejectH₀: 2160and acceptH₁: > 2160when the test statistic is

(Click to select)

greater than

less than

equal to

.

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 regardingH₀?

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Reject

Fail to reject

H₀.

d.Determine or estimate thep-value.

Thep-value is

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close to zero

zero

one

.