Question

Assume that temales have pulse rates that are normally distributed with a mean of u = 73.0 beats per minute and a standard deviation of o = 12.5 beats per minuto. Completo parts (a) through (1) below. a. 11 1 adult ferrate is randomly selected, find the probability that her pulse rate is between 66 beats per minute and 8 beats per minute. The probability is (Round to four decimal places as needed.) b. It 4 adult females are randomly selected, find the probability that they have pulse rates with a mean between 66 beats per minute and 80 beats per minute The probably (Round to four decimal places as needed)

Answer 1

U=730,0 = 19.5 (668490) Х-д < 80-73.0 12.5 :P 66-73.0 < 12.5 (-0.55 < (1156 Fe(7<0-56) - 1(7<-056) (viny z tele] 0.7123- 0.2877 10.4246 b) n =4, d=73-0 10:12.5 Pl66 4 X <80) 80r73.0 xall & P/66-13.0 12:51 12.5/14 =P(-1.12 <7 < 1,12) :P (Z< 1.12) - P(Z2-1-12) (utiny z table = 0.8686 - 0.1314 10.7379