Normal Distribution: mean 600, standard dev 100; find...

The credit score of a 35 year old applying for a mortgage at Ulysses Mortgage Associates is normally distributed with a mean of 600 and a standard deviation of 100. Seventy-five percent of the customers will have a credit score higher than what value?

staffordsc said:

The credit score of a 35 year old applying for a mortgage at Ulysses Mortgage Associates is normally distributed with a mean of 600 and a standard deviation of 100. Seventy-five percent of the customers will have a credit score higher than what value?

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Look at the z-score of the given population.

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What is the z-score?

We have been using the bell curve to solve these types of problems. I know the center of the curve will be 600 because that is the peak and the scale for the horizontal axis is 100 but I don't know what number to start and end with for both axis's.