When 255 college students are randomly selected and surveyed, it is found that 111 own a car. find the best point estimate for a 99% confidence interval for the true proportion of all college students who own a car. round your answer to the ten-thousandth decimal place?
Answers
Only authorized users can leave an answer!
Can't find the answer?
If you are not satisfied with the answer or you can’t find one, then try to use the search above or find similar answers below.
Find similar answersMore questions
Answered by jushmk
Sample size, N = 255 students Number of those owning a car = 111 Z at 99% confidence = 2.58 Now, Point estimate, p = 111/255 = 0.43529 True proportion = p+/- Z*Sqrt [p(1-p)/N] = 0.43529 +/- 2.58*Sqrt[0.43529(1-0.43529)/255] = 0.43529+/-0.0801 = (0.355186,0.51539) Re-writing into ten-thousandths decimal places: True proportion = (0.3552,0.5154)