The original pulse rates are measure with units of

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The original pulse rates are measure with units of"beatsperminute".What are the units of the corresponding zscores?
46.) Assume that females have pulse rates that are normally distributed with a mean of μ=74.0 beats per minute and a standard deviation of σ=12.5 beats per minute. Complete parts(a) through(c) below.If 1 adult female is randomlyselected, find the probability that her pulse rate is less than 77beats per minute.a.)The probability is .5948 If 25adult females are randomlyselected, find the probability that they have pulse rates with a mean less than 77beats per minute.b.)The probability is .8849Why can the normal distribution be used in part(b), even though the sample size does not exceed30?
47.) The overhead reach distances of adult females are normally distributed with a mean of 202.5 cm and a standard deviation of 8.6 cm.a.Find the probability that an individual distance is greater than 212.50cm.b.Find the probability that the mean for 15randomly selected distances is greater than 200.70 cm.c.Why can the normal distribution be used in part(b), even though the sample size does not exceed30?
48.) Assume that females have pulse rates that are normally distributed with a mean of μ=73.0 beats per minute and a standard deviation of σ=12.5 beats per minute. Complete parts(a) through(c) below.a.If 1 adult female is randomlyselected, find the probability that her pulse rate is between 67beats per minute and 79beats per minute.A: The probability is .3688b. If 4adult females are randomlyselected, find the probability that they have pulse rates with a mean between 67beats per minute and 79beats per minute.A: The probability is .663c. Why can the normal distribution be used in part(b),even though the sample size does not exceed30?

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