Ten alkalinity readings are made in the upper reaches of a river in the regions and fifteen in the lower reaches of the same river with the following result Upper reaches 91 75 1 63 0 77 1 0 Lower reaches 86 95 135 121 68 64 113 108 79 62 143 108 121 85 97 Investigate at 196 level of significance ,the claim that the true mean alkalinity of water in the lower reaches of this river is greater than that in the upper reaches. what is the critical value?

Ten alkalinity readings are made in the upper reaches of a river in the regions and fifteen in the lower reaches of the same river with the following result Upper reaches 91 75 1 63 0 77 1 0 Lower reaches 86 95 135 121 68 64 113 108 79 62 143 108 121 85 97 Investigate at 196 level of significance ,the claim that the true mean alkalinity of water in the lower reaches of this river is greater than that in the upper reaches. what is the critical value?

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Description: Ten alkalinity readings are made in the upper reaches of a river in the regions and fifteen in the lower reaches of the same river withthe following result:Upper reaches 91 75 91 88 94 63 86 7 71 69...Lower reaches 86 95 135 121 68 64 113 108 79 62|

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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21 a-d
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To test whether the mean time 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 2 3 17 28 24 23 26 23 21 31 27 19 27 26 a. Use these data to test whether the population mean times for mixing a batch of material differ for the three manufacturers. Use x=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-value is What is your conclusion? b. At the x=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 test?