SOLUTION: Can someone please show me how to figure this:
In a poll of 650 randomly selected high school seniors, 475 plan to attend college for at least 2 years.
A: Find the sample pro
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-> SOLUTION: Can someone please show me how to figure this:
In a poll of 650 randomly selected high school seniors, 475 plan to attend college for at least 2 years.
A: Find the sample pro
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Question 444839: Can someone please show me how to figure this:
In a poll of 650 randomly selected high school seniors, 475 plan to attend college for at least 2 years.
A: Find the sample proportion. -- I got about 73%
B: Find the margin of error. -- I don't understand how to do this.
C: Determine the sample size that produces a margin of error of +-6%.-- I also don't understand how to do this.
Any help would be greatly appreciated.
Thank you Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Can someone please show me how to figure this:
In a poll of 650 randomly selected high school seniors, 475 plan to attend college for at least 2 years.
A: Find the sample proportion. -- I got about 73%
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B: Find the margin of error.
E = z*sqrt[pq/n]
E = z*sqrt[0.73*0.27/650]
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Note: The z-value depends on factors you have not posted.
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C: Determine the sample size that produces a margin of error of +-6%.-- I also don't understand how to do this.
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n = [z/E]^2(pq)
z depends on the level of confidence.
E = 0.06
p = 1/2 = q because you have no information that they are otherwise.
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Cheers,
Stan H.
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