13.5

OO To test whether the meantime needed to mix a batch of material is the same for machines produced by three manufacturers, the Jacobs Chemical company obtained the following data on the time in minutes) needed to mix the material Manufacturer 1 20 2 3 13 35 12 24 33 16 22 38 20 34 19 a. Use these data to test whether the population mean times for mixing a batch of material differ for the three manufacturers. Use 0.05 Compute the values below (to 2 decimals, if necessary). Sum of squares, Treatment Sum of Squares, Error Mean Squares, Treatment Mean Squares, Error Calculate the value of the test statistic (to 2 decimals). The p-values - Select your answer What is your conclusion Select your answer b. At the 0.05 level of significance, use Fisher's LSD procedure to test for the equality of the means for manufacturers 1 and 3 Calculate Fisher's LSD Value (to 2 decimals) What conclusion can you draw after carrying out this testy