This Question: 1 pt a. I# 1 adult female is randomly selected,find the probabili

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This Question: 1 pt a. I# 1 adult female is randomly selected,find the probability that her pulse rate is less than 81 beats per minute The probability is[] Round to four decimal places as needed ) b. If 25 adult females are randomly selected, ind the probability that they have pulse rates with a mean less than 81 beats per minute The probability is Round to four decimal places as nooded) A. Since the original population has a normal diitrion he distrbton of sample mans is a namalaatuint n, apes B. Since the distribution is of sample means not indviduals, the detribution is a normal distrbution trany sample sin. O C. Since the mean pulse rato exceeds 30, the distribution of sample means is a normal distr bution for any sample size D. Since the distribution is of individuals, not sanple means, the detuton is a normal distrbton fr any sample size

Explanation / Answer

Mean = 75

Sd = 12.5

A) P(X < 81) = P(Z < (81 - 75)/12.5)

= P(Z < 0.48)

= 0.6844

B) n = 25

P(X bar < 81) = P(Z < (81 - 75)/(12.5/sqrt(25))

= P(Z < 2.4)

= 0.9918

C) Option-A

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