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You would like to study the weight of students at your university. Suppose the average for...

You would like to study the weight of students at your university. Suppose the average for all university students is 160 with a variance of 841.00 lbs, and that you take a sample of 25 students from your university.

a) What is the probability that the sample has a mean of 158 or more lbs?
probability =  

b) What is the probability that the sample has a mean between 160 and 162 lbs?
probability =  

Math   Statistics-And-Probability   
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