IQ tests are standardized and follow a normal distribution. On a common IQ test, the mean score is 100 with a standard deviation of 15.
a) What is the probability that a randomly selected individual gets a score of 105 or higher?
b) What are the mean and standard deviation of the average score of an SRS of 50 people? (Don't forget to justify this)
c) What is the probability that the average score of an SRS of 50 people is 105 or higher?

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For a, do I just convert to a z score?

and then use a normal table to find the probability?

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