Based on a random sample of 50, a 95% confidence interval for the population proportion was computed. holding everything else constant, which of the following will reduce the length of the confidence interval by half? (check all that apply): a. double the sample size. b. change the confidence level to 99.7%. c. decrease the sample proportion by half. d. quadruple the sample size. e. change the confidence level to 68%.

Danielle has $127.02 in her account before making any transactions. over the course of a week, danielle makes the following transactions: transaction debit ($) credit ($) birthday check 75.00 night out 66.14 garage sale proceeds 121.58 charitable donation 42.25 doctor’s appointment 115.30 at the end of the week, how much money is in danielle’s account? a. $99.91 b. $27.11 c. $184.41 d. $142.16 select the best answer from the choices provided a b c d

Bob’s bank charges him a $3.15 service fee every time he uses an out-of-network atm. if bob uses an out-of-network atm an average of three times every two weeks, how much will he pay in service fees over the course of a year? a. $327.60 b. $109.20 c. $491.40 d. $245.70 select the best answer from the choices provided a b c d

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?