For number 8 the interval is 71

1.Find the mean of a sampling distribution, when u = 31, o = 11, N = 78 2. Calculate the standard error of the mean (to two decimals), when u = 111, o = 8, N = 57 3.Calculate the standard error of the mean (to two decimals), when u = 148, o = 19, N = 73 4 Calculate the standard error of the mean (to two decimals), whenp = 116, 0 = 29, N = 36 5. As a caterer, you want to know the probability (expressed as 0. XXXX) that the bill for a given group of 50 will exceed $2000 when on average, bills for parties of 50 are $1784 with a standard deviation of $613 (Note: N=50, not 1) 6. As a caterer, you want to know the probability (expressed as 0. XXXX) | that the bill for a given group of 50 will exceed $2000 when on average, bills for parties of 50 are $1855 with a standard deviation of $376 (Note: N=50, not 1) 7. Which Z-value would be used to calculate a confidence interval at 55% 8. Which Z-value would be used to calculate a confidence interval at 7194