A chemical company is experimenting with four different mixtures of a chemical designed to kill a certain species of insect. Independent random samples of 200 insects are subjected to one of the four chemicals, and the number of insccts dead after 1 hour of exposure is counted. The results are summarized in table below. Observed Counts Mix 1 Mix 2 Mix 3 Mix 4 Total Dead 124 147 141 142 564 Not dead 76 53 59 48 236 Total 200 200 200 200 800 We want to test the hypothesis that the rate of kill is the same for all four mixtures. Test at the 5% level of significance.

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A chemical company is experimenting with four different mixtures of a chemical
designed to kill a certain species of insect. Independent random samples of
200 insects are subjected to one of the four chemicals, and the number of insects
dead after 1 hour of exposure is counted. The results are summarized in table below.
Observed Counts
Mix 1
Mix 2
Mix 3
Mix 4
Total
Dead
124
147
141
142
564
Not dead
76
53
59
48
236
Total
200
200
200
200
800
We want to test the hypothesis that the rate of kill is the same for all four mixtures.
Test at the 5% level of significance.
Transcribed Image Text:A chemical company is experimenting with four different mixtures of a chemical designed to kill a certain species of insect. Independent random samples of 200 insects are subjected to one of the four chemicals, and the number of insects dead after 1 hour of exposure is counted. The results are summarized in table below. Observed Counts Mix 1 Mix 2 Mix 3 Mix 4 Total Dead 124 147 141 142 564 Not dead 76 53 59 48 236 Total 200 200 200 200 800 We want to test the hypothesis that the rate of kill is the same for all four mixtures. Test at the 5% level of significance.
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