SOLUTION: A random sample of 80 printers discovered that 20 of them were being used in small businesses . Find the 99% limit for the population proportion of printers that are used in small

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Question 1040400: A random sample of 80 printers discovered that 20 of them were being used in small businesses . Find the 99% limit for the population proportion of printers that are used in small businesses.
A.
0.208 < p < 0.292
B.
0.013 < p < 0.487
C.
0.125 < p < 0.375
D.
0.137 < p < 0.363
Answer by stanbon(75887) About Me  (Show Source):
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A random sample of 80 printers discovered that 20 of them were being used in small businesses . Find the 99% limit for the population proportion of printers that are used in small businesses.
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99% CI:: 0.25 - 2.5758*sqrt(0.25*0.75/80) < p < 0.25 + 2.5758*sqrt(0.25*0.75/80)
99% CI:: 0.125 < p < 0.375
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Cheers,
Stan H.
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A.
0.208 < p < 0.292
B.
0.013 < p < 0.487
C.
0.125 < p < 0.375
D.
0.137 < p < 0.363