What is the probability of randomly selecting a score, Basic Statistics

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What is the probability of randomly selecting a score

A population of scores forms a normal distribution with a mean of 40 and a standard deviation of 12.

a. What is the probability of randomly selecting a score less than x=34?
b. What is the probability of selecting a sample of n=9 scores with a mean less than m=34?
c. What is the probability of selecting a sample of n= 36 scores with a mean less than m=34?

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Basic Statistics: What is the probability of randomly selecting a score

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Basic Statistics: What is the probability of randomly selecting a score

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