Mathematics, 18.12.2019 03:31, schnefai000

Acompany that produces garden hoses claims their product has a lifespan of at least 20 years. thus, they came up with the following hypothesis test.

h0 : μ ≥ 20
ha : μ < 20

a sample of 50 garden hoses provided a mean lifespan of 19.4 years, with a (population) standard
deviation of 2.

(a) compute the z-value test statistic

b) what is the p-value?

c) using α = 0.05, do you reject h0 or fail to reject h0?

Answers: 1

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Acompany that produces garden hoses claims their product has a lifespan of at least 20 years. thus,...