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Chapter 8: Q.125 (page 491)

Use the following information to answer the next three exercises: According to a Field Poll, 79% of California adults (actual results are 400 out of 506 surveyed) feel that “education and our schools” 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 and the schools are one of the top issues facing California.

A point estimate for the true population proportion is:

a. 0.90

b. 1.27

c. 0.79

d. 400

Short Answer

Expert verified

A point estimate for the true population proportion is (c)0.79

Step by step solution

01

Given Information

The per cent of California adults feel that “education and our schools” is one of the top issues facing California =79%

confidence interval =90%

02

Explanation

Sample proportion can be used for the true population proportion to find a point estimate.

Point estimate =No.ofsuccessesNo.oftrials=400509=0.79

A point estimate for the true population proportion is 0.79

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