Specimens of milk from a number of dairies in three different districts were analyzed, and the concentration
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District 1: 6.4, 5.8, 6.5, 7.7,
District 2: 7.1, 9.9, 11.2, 10.5, 6.5, 8.8,
District 3: 9.5, 9.0, 12.1.
a. Assuming that the variance of the concentration of strontium-90 is the same for the dairies in all three districts, determine the M.L.E. of the mean concentration in each of the districts and the M.L.E. of the common variance.
b. Test the hypothesis that the three districts have identical concentrations of strontium-90.
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Related Book For
Probability And Statistics
ISBN: 9780321500465
4th Edition
Authors: Morris H. DeGroot, Mark J. Schervish
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