What percentage of the observations lie

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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 %

Reference no: EM133084109

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