Assume that females have pulse rates that are normally distributed with a mean of u = 73.0 beats per minute and a standard deviation of a = 12.5 beats per minute
complete parts (a) through (c) below.
84,38%
a. if 1 adult female is randomly selected, find the probability that her pulse rate is between 69 beats per minute and 77 beats per minute
100%
the probability is 2510
(round to four decimal places as needed)
b. if 4 adult females are randomly selected, find the probability that they have pulse rates with a mean between 69 beats per minute and 77 beats per minute
9.52%
ontents
69.75
the probability is
(round to four dechsal places as needed.)
c. why can the normal distribution be used in part (b), even though the sample size does not exceed 30?
success
la library
o a. since the original population has a normal distribution, the distribution of sample means is a normal distribution for any sample size.
ob. since the distribution is of sample means, not individuals, the distribution is a normal distribution for any sample size,
since the retributin e of individuale not eamnla moane the distribution les normal dietrihatinn for any com la eira
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