Question

1000 eyeglass wearers around the globe completed an international survey about their eyewear preferences in a consumer research study. With regard to frame material, 378 participants preferred plastic frames, 316 preferred metallic frames, and the remainder preferred wooden frames. Which analysis should be performed to determine if there is any difference in preference for the different frame materials? Assume that all statistical assumptions are met.

Answer 1

From the given information,

Here we want test equality of 3 proportions.

Hence,

Chi-square test of homogeneity should be performed to determine if there is any difference between 3 preferences.

Thank you.