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21-10-2022
Mathematics

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in the same study from question 1, scientists recorded hg levels in a control group of the same species (i.e. animals not exposed to radiation). in a sample of 20 animals, the sample mean and standard deviation were 18.1, and 0.83, respectively. a. find the 95% confidence interval for the ratio of the two population variances. b. based on your result in (a), choose the appropriate method to construct a 95% confidence interval for the difference of means between the two groups. can you conclude that radiation lowers blood hg levels?

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