=+34. Female president. The Gallup organization has, over six decades, periodically asked the following question:

If your party nominated a generally well-qualified person for president who happened to be a woman, would you vote for that person?

We wonder if the proportion of the public who have “no opinion” on this issue has changed over the years. Here is a regression for the proportion of those respondents whose response to this question about voting for a woman president was “no opinion.” Assume that the conditions for inference are satisfied and that the response variable is proportion responding No Opinion.

Predictor Coeff SE(Coeff) t-Ratio P-Value Intercept 7.693 2.445 3.15 0.0071 Year -0.043 0.035 -1.21 0.2460 s = 2.28 R-Sq = 9.5%