Only need answers to check my work, thank you so much!

21. Out of 1,500 licensed drivers, 900 admitted that they do not like to drive at night. What is the 92% confidence interval for the population mean of drivers that do not like driving at night? O CI = (57.21%, 62. 876) O CI = (56.90%, 61.76%) CI = (56.74%, 63.26%) CI = (57.79%, 62.21%)\f23. 50 high school students were asked how many hours they study per day. The mean was 1.5 hours, with a standard deviation of 0.5 hours. Using a 5% level of significance, what could we claim about the mean study time of the entire population of high school students so that the hypothesis will fail to be rejected? Hou = 1.4 hrs O Hou = 1.3 hrs O Hou = 1.7 hrs Hou = 1.6 hrs24. A bookstore sells books for $2, $3, and $5. Let random variable X = "amount of money for one book." Look at the relative-frequency table below representing the amount of money spent on one item and the relative frequencies with which customers purchase them. x P(X = x) 2.72 3 .15 5.13 If the expected amount of money spent by a customer is $2.54, what is the standard deviation? O o = 1.01 O o = 3.09 O o = 2.71 O o = 1.0325. In how many ways can you choose 5 out of 11 people for a game of basketball? C 55,440 O 55 O 462 161,051