Question

Exercise 07.51 Algorithmic eBook Exercise 7.51 (Algorithmic) A market research firm conducts telephone surveys with a 41% historical response rate. a. What the probability that in a new sample of 400 telephone numbers, at least 140 individuals will cooperate and respond to the sample proportion will be at least 140/400 -0.357 Calculate the standard error to 4 decimals. 0.0244 Calculate the probability to 4 decimals, showing your steps along the way. POP ) - Piz2 0.9931 ) - 0.9931 b. If a follow-up study was completed a year later with only 64 telephone numbers, what is the probability that the response rate was Calculate the standard error to 4 decimals. 0.614 3 Calculate the probability to 4 decimals, showing your stens along the way. 40 ps4 O- 0.70 3.75 -0.1621 ) - 0.791 . 0.4364 0.0.2546 Partially Correct

i need help answering these few questions. thank u

Answer 1

solution is p=0.41 h = p b ] V ÞU-bid 1 a) PIS? z> 0.35-0.41 10.410.59 400 = P(2=-2.44 ) 0.992.7 0.41*0.59 17 b) SE= HIP) - v tom 69 = 0.0615 P1 [0.40] = p = 0.46] = M 0.400.45 0.46 -0.411 e cze 0.0615 "10.0615 ano = P(0.16 42€ (0.81) € 0.4910 ) - 0.4364 0.3546