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Mathematics, 21.11.2019 05:31 joselynrobles
For males the expected pulse rate is 70 per second and the standard deviation is 10 per second. for women the expected pulse rate is 77 per second and the standard deviation is 12 per second. let ! x ¼ the sample average pulse rate for a random sample of 40 men and let ! y ¼ the sample average pulse rate for a random sample of 36 women. what is the approximate distribution of \overline{x}-\overline{y} ? justify your answer.
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