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suppose a pop with an unknown dist has a mean of 8 and standard dev of...

suppose a pop with an unknown dist has a mean of 8 and standard dev of 3. a random sample size of 36 is selected

a. what is the probabilitg the sample mean is between 7.8 and 8.2

b. what is rhe probability the sample mean is greater than 8.2
Math   Statistics-And-Probability   
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