A random sample of 12 has a mean and standard deviation of 240 and 30, respectively Test the null hypothesis that 215 against the alternative hypothesis that 215 at a level of significance of (a) 5 and (b) 1 ...

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A random sample of 12 has a mean and standard deviation of 240 and 30, respectively. Test

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A random sample of 12 has a mean and standard deviation of 240 and 30, respectively. Test the null hypothesis that μ = 215 against the alternative hypothesis that μ > 215 at a level of significance of (a)

5% and

(b) 1%.

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