al all a math placement test For this year s test the

Last updated: 5/20/2023

al all a math placement test For this year s test the district has prepared two possible versions Version 1 that covers more material than last year s test and Version 2 test that is similar to last year s test The district suspects that the mean score for Version 1 will be less than the mean score for Version 2 To examine this over the summer the district randomly selects 95 incoming freshmen to come to its offices to take Version 1 and it randomly selects 90 incoming freshmen to come take Version 2 The 95 incoming freshmen taking Version 1 score a mean of 112 7 points with a standard deviation of 14 0 The 90 incoming freshmen taking Version 2 score a mean of 117 3 points with a standard deviation of 16 8 Assume that the population standard deviations of the test scores from the two versions can be estimated to be the sample standard deviations since the samples that are used to compute them are quite large At the 0 05 level of significance is there enough evidence to support the claim that the mean test score for Version 1 is less than the mean test score for Version 2 Perform a one tailed test Then complete the parts below MI Carry your intermediate computations to at least three decimal places If necessary consult a list of formulas a State the null hypothesis H and the alternative hypothesis H HO b Determine the type of test statistic to use Choose one c Find the value of the test statistic Round to three or more decimal places 0 d Find the critical value at the 0 05 level of significance Round to three or more decimal places e Can we support the claim that the mean test score for Version 1 is less than the mean test score of Version 2 OYes No H X 5 0 0 X O S 2 00 OSO O O P Q olo 020 O O