C. What is the mean difference and the corresponding 95% CI in proportion of adults with kidney stones between those who had higher than the sodium recommendation and those who meet the sodium recommendation? In your written statement alsoindicate which group proportion was subtracted from which. (Written statements & STATA output needed - 10%)

prtest kidney, by (sodiumhi) Two-sample test of proportions 0: Number of obs = 398 1: Number of obs = 1148 Group Mean Std. err. Z P> | z| [95% conf. interval] . 0703518 . 012819 . 0452269 . 0954766 . 0966899 . 0087224 . 0795942 . 1137856 diff - . 0263381 . 0155051 - . 0567276 . 0040513 under HO: . 0166394 -1. 58 0. 113 diff = prop(0) - prop(1) Z = -1.5829 HO: diff = 0 Ha: diff 0 Pr (Z |z|) = 0. 1134 Pr(Z > z) = 0.9433