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So we have a usa today gallup poll that was performed asking 1 ,024 adults whether the candidate's position on the value, the issue of family values was extremely important in determining a president, a vote for president.
00:16
And we have 768 out of 1 ,024, exactly 75 % in that sample.
00:22
So that is our point estimate for that proportion.
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Now, we want to verify that we can calculate a confidence interval with our first.
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Formula.
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And so if we take that n times our presumed p times the complement, that product of those three numbers is definitely greater than or equal to 10.
00:39
And we have sampled sufficiently small less than 5 % of the total population that we could have had for adults.
00:46
So we are good to go.
00:49
Now our 99 % confidence interval for that proportion, we take our estimate plus or minus 2 .575 or 5 .2 .576, depends on your textbook and times that standard air...