Question

Question Help 9.2.7-T Assigned Media A study was done on proctored and nonproctored tests. The results are shown in the table. Assume that the two samples are Independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.05 significance level for both parts. I H2 31 8724 AE 33 77.93 4490 X <H-H2O (Round to two decimal places as needed.) Ji V (0,0) More

Answer 1

let's use excel for finding tale, Use the following excel command. et dvedl, PoE T. INV.2T (DF) ZIDI Caros e goed T.INV, 21 (0:05,48) We will get t2/2 = 2:010634758 lower bound - (7) - ) - teszt 52 2 8:07629 = - 9.31 -17.3861 Lower bound Upper bound (7,-X 2) + ta/2 S₂ TIC + n2 - 9:31 + 8:07629 -1.23370 Hence 95% confidence interval is, - 17:39 <ll, - U2 < -1.23