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when 294 college students are randomly selected and surveyed, it is found that 130 own a...

when 294 college students are randomly selected and surveyed, it is found that 130 own a car. Find a 90% confidence interval for the proportion of all college students who own a car. Show all work!!

Math   Statistics-And-Probability   
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Answer #1

p = 130 / 294 = 0.442

Z for 90% confidence interval = Z0.05 = 1.645

confidence interval

                             

                             

                              = (0.394 , 0.490)

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