A sample of 40 observations results in a sample mean of 436. The
population standard deviation...
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A sample of 40 observations results in a sample mean of 436. Thepopulation standard deviation is known to be 121.
Construct a 95% confidence interval for the populationmean.
Does the sample evidence enable to conclude that the populationmean is greater than 400 with the 5% significance level? Conductthe test based on the critical value approach.
Does the sample evidence enable to conclude that the populationmean is greater than 400 with the 5% significance level? Conductthe test based on the p-value approach.
Does the sample evidence enable to conclude that the populationmean is greater than 400 with the 10% significance level? Conductthe test based on the p-value approach.
Does the sample evidence enable to conclude that the populationmean is different from 400 with the 5% significance level? Conductthe test based on the p-value approach.
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