8) The contingency table below is from an auto factory testing for the quality or welding. Number of Welds Low Quality High Quality 467 445 Moderate Quality 191 42 Day Evening Night 171 34 254 129 17...

If needed do not use a Pvalue to answer any problem. No credit will be given if a P value is used. Use only criticalvalues.

Extracted text: 8) The contingency table below is from an auto factory testing for the quality or welding. Number of Welds Low Quality High Quality 467 445 Moderate Quality 191 42 Day Evening Night 171 34 254 129 17 Make a table of expected frequencies. Compute the value of the chi-square statistic. Can you conclude that the quality varies among shifts? Use the a = 0.01 level of significance. a) b) c) You are not required to show your work on this problem 72°F ch