Question

Express the confidence interval 66.9%±3.7%66.9%±3.7% in the form of a trilinear inequality.

Answer 1

p^ = 66.9%

ME = 3.7%

Confidence interval = (p^ - ME < p^ < p^ + ME)

                                = 66.9-3.7 < p^ < 66.9+3.7

                                = 63.2% < p^ < 70.6%