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B. Choosing a Test To test the claim that there is a difference in the mean length of hospital stays for patients (ages 17 and

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B. Choosing a Test To test the claim that there is a difference in the mean length of hospital stays for patients (ages 17 and younger) diagnosed with pneumonia, are the samples independent or dependent? Do you need to know what each population's distribution is? Do you need to know anything about the population variances

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