Question

A study of the surface roughness of coated interior pipe used in old was conducted. The data in micrometers) for 20 sampled pipe ons we reproduced in the table below. Conducta sormetto whether the median surface roughness of coated interior pipe, differs from 2 micrometers. Test using 0.10 1.87 2.65 2.48 142 198 1.35 2.65 2.70 2.78 2.75 Fuldata set 2.01 2.50 1.47 2.35 1.72 2.35 1.86 2.25 2.65 2.24 What are the null and afternative hypotheses? O A. Hon=13 OB. H:9-2 OC. Mo: 1-7 M:13 H2 OD. Hon=13 OE HY:n7 OF. Ho: 2 H: 13 H7 What is the test statistic for this test? The test statistio in D What is the p-value for this test? (Round to the nearest thousandth as needed.) What is the conclusion for this test? Ho. There is evidence to indicate the median surface roughness of coated interior pipe differs from 2 micrometers at 0.10

Answer 1

S of Given data set 1.35 2.65 2.76 2.28 2.75 2.65 2.48 1.42 1.98 1.22 2.35 2.35 1.86 1.42 2.65 2.25 2.24 20 Ex - uu. 18 = 2.209 ECX-532 Ste don 0.492 Ho h - 2 Ha : 72 2.2009 2 1.98 test ñ - Mo slun statistic 0.492 192/50 P-value with df = 19, t=1.98 is P-value = 0.031187 p-value <a=0.1. Hence reject to Conclusion: Reject to. There is sufficient evidence to indicate the median surface roughness of coated interior pipe differs from 2 micrometors at a=0.10