A statistics exam has a normal distribution of scores with mean  equals 68 and standard deviation  equals 10.  Find the ff. probabilities: P ( X > 64) P ( X < 55) P ( 48 < X < 70)

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A: 10)Given that, X ~ Norm(64.4, 2.4^2),

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A: Answer Given,The sample size [n] = 26degree of freedom = n-1 = 26-1 = 25

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A: let X be a discrete random variable with probability mass function given asP(x)={1/10if x=04/10if…

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Q: You wish to test the following claim (H) at a significance level of a = 0.05. Ho:p = 0.57 Ha:p #…

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