In a random sample of 200 people, 74% of them said that they do go to Truecar.com before they go shopping for a vehicle.    Step 1 of 1:  Determine a 90% confidence interval for the true proportion of people who do consult Truecar.com before shopping for a vehicle.   A) 0.688 to 0.792 (to three decimal places)  B) 0.689 to 0.791 (to three decimal places) C) 0.690 to 0.790 (to three decimal places) D) 0.691 to 0.789  (to three decimal places)   Step 2 of 2: Determine a 99% confidence interval for the true proportion of people who do consult Truecar.com before shopping for a vehicle. A) (0.662, 0.822) B) (0.661, 0.821) C) (0.663, 0.823) D) (0.660, 0.820)

Question
In a random sample of 200 people, 74% of them said that they do go to Truecar.com before they go shopping for a vehicle. 
 
Step 1 of 1: 
Determine a 90% confidence interval for the true proportion of people who do consult Truecar.com before shopping for a vehicle.
 
A) 0.688 to 0.792 (to three decimal places) 
B) 0.689 to 0.791 (to three decimal places)
C) 0.690 to 0.790 (to three decimal places)
D) 0.691 to 0.789  (to three decimal places)
 
Step 2 of 2: Determine a 99% confidence interval for the true proportion of people who do consult Truecar.com before shopping for a vehicle.
A) (0.662, 0.822)
B) (0.661, 0.821)
C) (0.663, 0.823)
D) (0.660, 0.820)
 
 
 
 
 

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