Question
The credit scores of 35-year-olds applying for a mortgage at Ulysses Mortgage Associates are normally distributed with a mean of 620 and a standard deviation
The credit scores of 35-year-olds applying for a mortgage at Ulysses Mortgage Associates are normally distributed with a mean of 620 and a standard deviation of 90. |
(a) | Find the credit score that defines the upper 20 percent.(Use Excel or Appendix C for calculation of z-value. Round your final answer to 2 decimal places.) |
Credit score |
(b) | Eighty-five percent of the customers will have a credit score higher than what value?(Use Excel or Appendix C for calculation of z-value. Round your final answer to 2 decimal places.) |
Credit score |
(c) | Within what range would the middle 90 percent of credit scores lie?(Use Excel or Appendix C for calculation of z-value. Round your final answer to 2 decimal places.) |
Range | to |
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