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According to a poll, 76% of California adults (387 out of 506 surveyed) feel that education...

According to a poll, 76% of California adults (387 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California.

What is a point estimate for the true population proportion?

Math   Statistics-And-Probability   
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Answer #1

point estimate for the true population proportion = 0.76

Sample proportion = 0.76
Population size (N) = 506
Sample size (n) = 387
Confidence interval (in %) = 90
z @ 90% = 1.645

Since we know that

Required confidence interval = (0.76-0.0173, 0.76+0.0173)
Required confidence interval = (0.7427, 0.7773)

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