13) College surveyed 900 students to learn if students would like to switch to Coke products in school vending machines. The survey found 396 said the college should make the switch. What is the point estimate of the proportion of students at the college who would say the college should switch to Coke products?
A. 396
B. 900
C. 0.44
D. 2.27
14) College surveyed 900 students to learn if students would like to switch to Coke products in school vending machines. The survey found 396 said the college should make the switch. The margin of error for a 95% confidence interval for the proportion of students at the college who would say the college should switch to Coke products is
A. 0
B. .0324
C. .0272
D. None of the alternative answers is correct.
15) College surveyed 900 students to learn if students would like to switch to Coke products in school vending machines. The survey found 396 said the college should make the switch. The 95% confidence interval for the proportion of students at the college who would say the college should switch to Coke products is
A. 0 to 900
B. 396 to 900
C. 0.4076 to .4724
D. 0.4128 to .4672
20) Six hundred consumers were asked whether they would like to purchase a domestic or a foreign automobile, with 240 saying domestic. The margin of error for a 95% confidence interval for the population proportion saying domestic is
A. 0.8633
B. 0.6900
C. 0.0392
D. 0.0345
please all 4 questions, I have been having trouble with that and also wit wrong answers. thanks
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