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When is it appropriate to use the paired difference t-test? Select one: O a. Four samples are compared at once O b. Any two samples are compared O c. Two independent samples are compared O d. Two dependent samples are comparedAdministering the same test to a group of 15 students and a second group of 15 students to see which group scores higher is an example of Select one: O a. a one sample test of means. O b. a two sample test of means of two independent groups. O c. a paired t-test of two dependent groups. O d. a test of proportions of two groups.A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It is important that the diameters he as close as possible to an industry.r standard. The output from each process is sampled and the average error from the indu stry standard is calculated. The results are presented below. WW Mean .2mn1 Illlmm Stmdard Dcviation lmm ulme Sample Size 12 14 The researcher is interested in determining whether there is evidence that Process A yields a higher average error rate than Process B. Assume that the population standard deviations are equal.. Assume that the population standard deviations are equal. II.I'l.|'hat is the null hypothesis? A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It is important that the diameters he as close as possible to an industry standard. The output from each process is sampled and the average error from the industry standard is calculated. The results are presented below. WW Mean .2mm .lmm Standard Deviation lmm [I'lme Sample Size 12 1 4 The researcher is interested in determining whether there is evidence that Process A yields a higher average error than Process B. Assume that the population standard deviations are equal. II.I'l.I'hat is the altemate hypothesis? :3\" #4 = #3. a. .u. " .u. C. #5 5:\": D, F4 'F9_ Select one: Gall. Gills Doc Od.D A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It is important that the diameters be as close as possible to an industryr standard. The output from each process is sampled and the average error from the industry standard is calculated. The results are presented below. WW Mean (1.0!)me lmm Standard Deviation lmm llmm Sample Size 1 2 l 4 The researcher is interested in determining whether there is evidence that Process A yields a higher average error rate than Process B. Assu me that the population standard deviations are equal. Iv'lr'hat of the following is the appropriate procedure for testing the results of the experiment? Select one: Q a. Comparing the proportions of two independent groups - Process A and Process E 0 tr. Comparing the variances of two independent groups - Process A and Process E. O c. Comparing the means oftwo independent groups - Process A and Process E C' d. Comparing the means oftwo dependent groups - Process A. and Process E A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It is important that the diameters be as close as possible to an industryr standard. The output from each process is sampled and the average error from the industry standard is calculated. The result: are presented below. WW Mean lmm ll-[126mm Standard Deviation lmm .0'12mm Sample Size 12 14 The researcher is interested in determining whether there is evidence that Process A yields a higher average error than Process B. Assume that the population standard deviations are equal. Iv'll'hat is the critical tvalue at the 1% level of signicance? Select one: D a. +2492 0 b. -2.492 U c. i'l.T1'l D d. i239? .5. national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It is important that the diameters he as close as possible to an industry.r standard. The output from each process is sampled and the average error from the indu stry standard is calculated. The results are presented below. WW Mean .2mm Illlmm Standard Deviation lllmm 'lme Sample Size 12 1 4 The researcher is interested in determining whether there is evidence that the two processes yield different average errors. Assume that the population standard deviations are equal. II.I'l.|'hat is the computed value of t? Select one: D a. +1492 C" b. -2.492 C" c. -13.?'| Q d. +1331 A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It is important that the diameters be as close as possible to an industry standard. The output from each process is sampled and the average error from the industry standard is calculated. The results are presented below. WW Mom imm ENE-mm Standard Deviation lmm lme Sample Size 12 14 The researcher is interested in determining whether there is eyidence that Process A yields a higher average error than Process B. Assume that the population standard deyiations are equal. II.I'l.I'hat is the decision at the 196 level of significance? Select one: D a. Reject the null hypothesis and conclude that Process A has a larger ayerage errorthan Process B U h. Reject the null hypothesis and conclude the means are the same. 0 c. Fail to reject the null hypothesis and conclude that Process A does not have a larger ayerage error than Process E D d. Fail to reject the null hypothesis and conclude the means are different