Find standard deviation of sample mean credit scores


The BestEver credit scores are normally distributed with a mean of 600 and a standard deviation of 100.

1. What is the probability that a randomly person has a BestEver credit score between 500 and 700?

2. Find the 90th percentile of the BestEver credit score distribution.

3. If a random sample of 100 people is selected, what is the standard deviation of the sample mean BestEver credit scores?

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Mathematics: Find standard deviation of sample mean credit scores
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