Question

3) Out of a random sample of 1000 people, 490 expressed a preference for the Joe’s Barbeque.

The following questions are about calculating a confidence interval. Type in your choice of answer between the arrows.

A] What is the Critical Value (three decimal places) needed to determine a 98% confidence interval for the proportion of the population that prefers Joe’s Barbeque?

a. z =2.576      b. t = 2.640 c. z = 2.326 d. t = 2.093 e. z = 1.645 f. t = 1.634  

B] What is the Point Estimate of the proportion preferring Joe’s Barbeque (three decimal places)?

a. 0.510          b. 0.115       c. 0.980       d. 0.490       e. 0.020       f. 0.010

C] What is the Margin of Error (three decimal places) for this 98% confidence interval?

a. 0.095          b. 0.105       c. 0.037       d. 0.986       e. 0.110       f. 0.012

     ➔       

D] What is the 98% Confidence Interval (three decimal places)?

a. .476 £ p £ .503            d. .453 £ p £ .527          ➔       

b. .499 £ p £ .644             e. .323 £ p £ .399                  

c. .479 £ p £ .499            f. .444 £ p £ .537

Answer 1