Question b: The estimated mean inCase 1(x_A-x_B= 49) is how much lower than the hypothesis value?

Question d: the answer should be Case 1, 2,3,5 but the answer has only three options. Which three is the correct choice.

Question f( last question), I think B is better, but i am not sure. Could you please explaining it for me?

Thank You ~

Consider a study to determine the compressive strength of concrete blocks used for paving. Two methods of manufacturing concrete blocks are under investigation method A (which is more expensive) and method B. Research indicates that the greater the compressive strength of concrete, the greater the durability of a concrete block. Therefore the question is, which one, if either, of the two methods produces greater compressive strength. In addition, the manufacturer considers that an average difference between the methods of less than 500 psi (pounds per square inch) would be of no consequence, whereas a difference of 500 psi or more could result in considerable benets. Some possible outcomes of the study are: sebQ-g) P-value 95% Cl Case 1 3.55 0.0000 (42, 56) Case 2 29.24 0.0233 (-124, -8) Case 3 -30 19.92 0.1305 (-70, 10) Case 4 536 11.28 0.0000 (513, 559) Case 5 100 303.05 0.7435 (-506, 706) Note: The hypotheses associated with the quoted P-values are: H0: There is no difference in the mean compressive strength of concrete blocks when using the two methods of manufacture. H1: There is a difference in the mean compressive strength of concrete blocks when using the two methods of manufacture. Et- inch) would be of no consequence, whereas a difference of 500 psi or more could result in considerable benets. Some possible outcomes of the study are: \"we Note: The hypotheses associated with the quoted P-values are: Ho: There is no difference in the mean compressive strength of concrete blocks when using the two methods of manufacture. H1: There is a difference in the mean compressive strength of concrete blocks when using the two methods of manufacture. a) What is the hypothesised value? 500 Vi b) Select the correct options to complete the sentence about Case 1: The estimated mean in Case 1 (EA-3 = 49) is (2d.p.) standard . i 173.95 errors below V the hi 48 i 43.37 c) Which case(s) demonstrate, at the 5% levi :8 ed mean, f, is statistically different from the hypothesisedW' V' d) In which case(s) are we are able to claim that the difference between the true mean compressive strengths for method A and method B: odf X G practical significance - Goo X [ Select ] confidence interval visua /62916/quizzes/73828/take Cases 4 and 5 Cases 1, 2 and 3 renCite - Qui... [ STAT108 [ English B Cases 1, 2 and 5 61 N... B114 Quiz Answer... DJ Select the correct options to complete Cases 2, 4 and 5 The estimated mean in Case 1 (XA-XB = 4 Cases 2 and 3 Cases 1 and 2 (2d.p.) standard Cases 2 and 4 errors below th Cases 1 and 4 Cases 2 and 5 c) Which case(s) demonstrate, at the 5% Cases 3 and 4 served mean, x, is statistically different from the hypothesis Cases 1, 2 and 4 Cases 1, 4 and 5 d) In which case(s) are we are able to clail Cases 2, 3 and 4 he true mean compressive Cases 1 and 3 strengths for method A and method B: Cases 3, 4 and 5 has practical significance Case 4 Cases 1 and 5 Cases 3 and 5 Cases 1, 3 and 4 - does not have practical significance v Cases 2, 3 and 5 Cases 1, 3 and 5 e) Select one case in which we have learned nothing useful Case 1 f) Suppose the actual outcome for the study is: x se (x ) P-value 95% CI Case 6 573 14.83 0.0000 (543, 603) Select the correct option to complete the sentences interpreting this output: In this case the difference between the true mean compressive strengths for method A and method B is statistically significant (at the 5% level). We are not able to claim that the difference between the true mean compressive strengths has practical importance.e) Select one case in which we have learned nothing useful I Case 1 V f} Suppose the actual outcome for the study is: Select the correct option to complete the sentences interpreting this output: In this case the difference between the true mean compressive strengths for method A and method B is " ' statistically signicant (at the 5% level). We are not V' able to claim that the difference between the true mean compressive strengths has practical importance. With 95% condence the mean compressive strength using method A is estimated to be 543 V and somewhere between 603 V lower V' than the mean compressive strength using method B. [ Select ] Based on these results I woul V' recommend USiI'IQ method B recommend using method A not be able to recommend which method to use