A random sampleof 175 measurements possessed a meanx-bar=8.2 and a standard deviations=0.79

a.) Form a 95% CI for mu.

b.) Test H0:mu=8.3 against Ha:mu not equal 8.3 Use alpha=0.05.

c. Test H0:mu=8.4 against Ha:mu not equal 8.4 Use alpha=0.05.

a.) Form a 95% CI for mu.

X = 8.2

SD = 0.79

N = 175

Then compute standard error is

SE = SD/SQRT(N) = 0.79/SQRT(175) = 0.06

From a z table, we find that the critical 97.5% z value is 1.96

Then lower …

The solution gives the steps for testing hypotheses in 153 words.