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18 November, 04:25

Question 8

Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a sample proportion of 18 percent and a margin of error of 4 percent. What is the width of the confidence interval?

A

2

percent

4 percent

e percent

8 percent

16 percent

36 percent

36 percent

+2
Answers (1)
  1. 18 November, 05:46
    0
    The answer is 8%

    From the given information, the sample proportion is 18% and a margin of error is 4 percent.

    Then, a 90% confidence interval to estimate the population proportion is

    (18 + / - 4)

    (18-4, 18+4)

    (14%, 22%)

    22-14 = 8
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