In the sample survey of 54 discount brokers that showed that the mean price charged for a trade of 100 shares at $50 per share was $33.77 (aaii journal, february 2006). the survey is conducted annually. with the historical data available, assume a known population standard deviation of $15. what the 95% confidence interval estimate of the population mean?

a. ucl = 52.94 lcl = 47.06

b. ucl = 36.71 lcl = 30.83

c. ucl = 50.54 lcl = 49.46

d. ucl = $37.77 lcl = $29.77

Can somebody me out with this question

What is the volume of a rectangular prism if the length is 10.4 mm the width is 5 mm in the height is 8 mm

Cumulative examcumulative exam active13time remaining02: 44: 18the graph represents the data cost for monthly internetservice for a cell phone.which function, c(x), represents the monthly cost in dollarsin terms of x, the number of gigabytes used in a month? cell phone internet service(15,5x + 10150,0sx522 < x < 664x115, osx< 25x + 20, 2< x< 650, 65815%,monthly cost (s)20x + 5| 50x,0 < x < 22 < x < 664x( 15x, osx< 2c(x) = 5x + 10, 2< x< 6150x, 65 x5+1234 5 6 7 8 9 10 11 12gigabytes used