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 OA Ho H H H H H C Ho H H H H H a Use a 0 05 significance level to test the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests What are the null and alternative hypotheses OB Ho H1 H H H H OD Ho H1 H H The test statistic t is 2 31 Round to two decimal places as needed The P value is Round to three decimal places as needed H n X S H H 141 35 74 59 11 04 H 34 83 22 18 86