i dont understand how to do these questions. this is just homework and homework for this class is not graded only the tests. im just trying to learn how to do it before the test. Drop down for the second question is "greater, equal or less than", the second drop down says "reject, do not reject"

Provided below are summary statistics for independent simple random samples from two populations. Use the nonpooled t-test and the nonpooled t-interval procedure to conduct the required hypothesis test and obtain the specified confidence interval. X1 = 21, S1 = 2, n1 = 20, X2 = 23, $2 = 5, n2 = 10 a. Left-tailed test, a =0.05 b. 90% confidence interval a. What are the hypotheses for the t-test? O A. Ho: M1 = H2 OB. Ho: H1 = H2 Ha: My > H2 Ha: H1 * H2 OC. Ho: MISH2 OD. Ho: H1 = H2 Ha: H1 > H2 Ha: My

H2 Ha: My * H2 OC. Ho: MISH2 OD. Ho: H1 = H2 Ha: H1 > H2 Ha: H1 - H2 Find the test statistic. t= (Round to three decimal places as needed.) Find the P-value. P = (Round to four decimal places as needed.) What is the conclusion of the hypothesis test? O A. Reject Ho. There is insufficient evidence that u, is less than H2- O B. Do not reject Ho. There is sufficient evidence that u, is less than H2- O C. Reject Ho. There is sufficient evidence that u, is less than H2- O D. Do not reject Ho. There is insufficient evidence that u, is less than H2- b. The 90% confidence interval is from to (Round to three decimal places as needed.)Provided below are summary statistics for independent simple random samples from two populations. Use the pooled t-test and the pooled t-interval procedure to conduct the required hypothesis test and obtain the specied condence interval. x1 =15, s1 :22, n1 =11,i2=16, s2=2.3, n2=11 a. Two-tailed test. a = 0.10 b. 90% condence interval a. First, what are the correct hypotheses for a two-tailed test? 0 A. H01p1p2 O B. H01p1>p2 Ha:l11=l12 Ha: l11 =l12 O C. H02p1u2 Ha:ll1p2 Ha5l11 =ll2 Ha5i11=l12 OC. H01p1ll2 Ha5i11