this is one of my questions on my homework this week and I'm not sure I'm doing it right. The further I get in this class the more I feel lost.

1. The amounts (in ounces) of juice in eight randomly selected juice bottles are:

15.4 15.7 15.2 15.8 15.8 15.4 15.0 15.6

Assuming the population of amounts in juice bottles is known to be normally distributed, create a 95% confidence interval estimate for , the mean amount of juice in all bottles.

You will be asked to identify x-bar, s, alpha, df, t, E and the confidence interval. (3 points each)

This is what I have come up with so far:

X-bar = 15.488

S = .290

alpha = .05

df = 7

T =

E =

critical value= 1.96

CI = (15.2456, 15.7304)

Is this right so far? I have a partner in my class I'm working on this with and her answers are totally different than mine.