A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to...
A sample mean, sample size, and population standard
deviation are given. Use the one-mean z-test to perform the
required hypothesis test at the given significance level. Use the
P-value approach.
x̄ = 259, n = 15, σ = 19, H
0: μ = 250, Ha : μ
> 250, α = 0.01
Homework Answers
Z test statistic formula
=1.84
P value = 0.0329................................by using Z table or Excel command =1-NORMSDIST(1.84)
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A sample mean, sample size, and population standard
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A sample mean, sample size, and population standard deviation are provided below. Use the one-mean z-test to perform the required hypothesis test at the 10% significance level. x=37, n = 31, σ=9, H0 : μ=39, Ha: μ<39 EB Click here to view a partial table of areas under the standard normal curve. The test statistic is z- (Round to two decimal places as needed.)
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A sample mean, sample standard deviation, and sample size are given. Use the one-mean t-test to perform the required hypothesis test about the mean, μ, of the population from which the sample was drawn. Use the critical-value approach. 7. x-20.8, s-7.3>, n = 11, Ho: μ = 18.7, Ha: μ # 18.7, α = 0.05 a. Test statistic: t = 0.95. Critical values: ±1.96. Reject Ho. There is sufficient evidence to b. Test statistic: 0.95. Critical values: t = ±2.201....
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