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The mean of a normal probability distribution is 220; the standard deviation is 15. Refer to...

The mean of a normal probability distribution is 220; the standard deviation is 15. Refer to the table in Appendix B.1. (Round the final answers to 2 decimal places.) a. About what percentage of the observations lie between 205 and 235? Percentage of observations % b. About what percentage of the observations lie between 190 and 250? Percentage of observations % c. About what percentage of the observations lie between 175 and 265? Percentage of observations %

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