Question 7 Not yet answered Marked out of 5.00 p Flag question Which of the following is not necessary to determine how large a sample to select from a population? Select one: a. margin of error b. an estimate of the population variation c. the level of confidence in estimating the population parameter d. population size e. the maximum allowable error in estimating the population parameter Question 8 Not yet answered Marked out of 5.00 p Flag question The mean salary of randomly selected 18 employee at company A is $4852 per month with a standard deviation of $778. The mean salary of randomly selected 15 employee at company B is $4488 per month with a standard deviation of $644. Estimate the true difference between salary of all employees in the company A and B. Select one: o a. cannot be determined O b. 4852 - 4488 2 O C. 778 / 18+ o d. none of the answers O e. 778 -644 Question 9 Not yet answered Marked out of 5.00 In a random sample of 393 customers, it is seen that 392 of them have more than 2 credit cards. Estimate the true ratio of the customers that have more than 2 credit cards. Select one: a. 392 b. cannot be determined C. 392/393 d. 393 / 392 e. none of the answers Question 7 Hu... Mil....3 Flazqucation nic of the following is rutrece ser detine oklarte sercle select from a pojistion? Sole Odgor Oploppepatic variation other werde is.. the popustione dl. Cacula: size OP.chrumpor incimring me popular para Question & Nr 1 Meter Flag quartian the trends landaly selected serpluse al company is 34352 per ment sich starcard seisian 5770. The car salary tranny selected 15 malccxcom E 1: 34400 per month with a scendere Jeristic of 5511. Existe tre true ciflere betrenselayoelluloyee in de LUNA A U. akten CUL C. 40526400 c.778': 0-64:13 ome of the arcurs 0773 64 Question 9 Nara guwon in a candan sopir 32 Creer iris 390 nf iter har man harc edir. Fire the me rade or the caterers that have more than 2 oredit cards. aul h.compromines C. $92,393 0 Prowers