webbjalia04
23.10.2019 •
Mathematics
He included data set includes 40 pulse rates of men, and those pulse rates have a mean of 67.3 beats per minute and a standard deviation of 10.3 beats per minute. that data set also includes 40 pulse rates of women, and those pulse rates have a mean of 77.5 beats per minute and a standard deviation of 11.6 beats per minute. assume the samples selected are both random samples selected from a population with a normal distribution.
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Ответ:
7 grade 144
8 grade 128
equals 408 students
12 groups 34 students