SOLUTION: In a random sample of 500 observations, we found the proportion of success to be 48%. Estimate with 95% confidence the population proportion success.

Question 1162279: In a random sample of 500 observations, we found the proportion of success to be 48%. Estimate with 95% confidence the population proportion success.
Answer by AnlytcPhil(1806) (Show Source): You can put this solution on YOUR website!


On your TI-84 calculator,

Press stat 
Press the right arrow key to highlight TESTS
Use the down arrow key to scroll down to  A:1-PropZint
Press enter


       1-PropZInt
x:0.48*500        <--Press the down arrow, it will change to x:240  
n:500             <--Press the down arrow
C-Level:0.95      <--Press the down arrow 
Calculate         <--Press enter

       1-PropZint
(0.43621,0.52379)
p=0.48
n=500

The answer is (0.43621,0.52379) or 0.43621 < p < 0.52379

Round off as your teacher told you.

Edwin

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