SOLUTION: A sample of 195 students found that 27% had a GPA lower than 1.89. The population from which the sample was drawn is approximately normally distributed. Construct the 90% confidenc

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Question 868956: A sample of 195 students found that 27% had a GPA lower than 1.89. The population from which the sample was drawn is approximately normally distributed. Construct the 90% confidence interval for the population proportion.
Answer by stanbon(75887) About Me  (Show Source):
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A sample of 195 students found that 27% had a GPA lower than 1.89. The population from which the sample was drawn is approximately normally distributed. Construct the 90% confidence interval for the population proportion.
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sample proportion = p-hat = 0.27
ME = z*sqrt[pq/n] = 1.645*sqrt[0.27*0.73/195] = 0.0523
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90% CI:: 0.27-0.0523 < p < 0.27+0.0523
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Cheers,
Stan H.
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