A Population Proportion · Exercise 43
Five hundred eleven (511) homes in a certain southern California community are randomly surveyed to determine whether they meet minimal earthquake preparedness recommendations. One hundred seventy-three (173) of the homes surveyed meet the minimum recommendations for earthquake preparedness, and 338 do not.
Find the confidence interval at the 90 percent confidence level for the true population proportion of southern California community homes meeting at least the minimum recommendations for earthquake preparedness.
(a) (0.2975, 0.3796)
(b) (0.6270, 0.6959)
(c) (0.3041, 0.3730)
(d) (0.6204, 0.7025)
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Statistics · §8.3 A Population Proportion · Exercise 43
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