Question

You may need to use the appropriate appendix table or technology to answer this question The president of Doerman Distributors, Inc., believes that 35% of the firm's orders come from first-time customers. A random sample of 200 orders will be used to estimate the proportion of first-time customers. (a) Assume that the president is correct and p 0.35. What is the sampling distribution of p for n 200? (Round your answer for o to four decimal places.) , approximating the sampling distribution with a normal distribution Select. appropriate in this case. Since np and n(1 - P) (b) What is the probability that the sample proportion p will be between 0.25 and 0.45? (Round your answer to four decimal places.) (c) What is the probability that the sample proportion will be between 0.30 and 0.40? (Round your answer to four decimal places.)

Answer 1

0 dlutionc gin dabi ven O 35 V0.65 mean P Mean P o 35 an С 3511-035) 200 0.35 xo, 65 o 22?5 45S6 -3 11375X10 -0.033 260! 0.03394 standard dwafion"; О.0337у

b) To ndpebab P(o-25)- 25o 35 o 3S(I O 35) 200 2.00 Plo 2s) - -2.6 PL-P) E 0-45 0 35 o-3s i-035)

0 0 3520 65 200 0.22子S 2o0 P 2462 246) 690 C TOindhnbabili Ву uaim tut sht.she 2: ê-e 30) .. О. 36-035 20o

冫ー凸. oS o30148 200 O os 200 凸心S oe3324 @wo) 1.48 we get 0.13