Question

i got them wrong the first time

In a random sample of or this a convicted of action was determined Question Ho with a wandando o contra c or logo The 90% confidence intervalis (Use ascending order Mound to two decimal places as needed Enter your answer in the edit folds and then click Check Answer All parts showing Clear All

Answer 1

15. The size of the The provided sample mean is X = 64 and the sample standard deviation is : sample is n = 39 and the required confidence level is 90%. The number of degrees of freedom are df = 39 - 1 = 38, and the significance level is a 0.1 Based on the provided information, the critical t-value for a = 0.1 and df = 38 degrees of freedom is to = 1.686. The 90% confidence for the population mean u is computed using the following expression c1=(8 - How 8 + tema) Therefore, based on the information provided, the 90% confidence for the population mean is c1 = (61 – 166 x 15,64 + 1.65%6* 15) = (64 - 4.05,64 +4.05) = (59.95,68.05)

Answer : the 90 % confidence interval is ( 59.95 , 68.05 )

The provided sample mean is X = 4.4 and the sample standard deviation is 8 = 15.2. The size of the sample is n = 80 and the required confidence level is 95%. The number of degrees of freedom are df = 80 - 1 = 79, and the significance level is a = 0.05. Based on the provided information, the critical t-value for a = 0.05 and df = 79 degrees of freedom is t = 1.99 The 95% confidence for the population mean u is computed using the following expression CI= (* -*+ ) is Therefore, based on the information provided, the 95% confidence for the population mean 4_1.99 x 15. 2 . 1.99 x 15.2 80 V 80 = (4.4 -3.383, 4.4 +3.383) = (1.017, 7.783)

Answer :

Lower limit = 1.02

upper limit = 7.78