iPad? 10:46 PM * 62%- MyMathLab Homework STAT 130 - Spring 2018-MWF 10AM Kria Al

Question

iPad? 10:46 PM * 62%- MyMathLab Homework STAT 130 - Spring 2018-MWF 10AM Kria Alward 4/4/18 10:46 PM Homework: HW #8-Chapter 7-Cls for Proportions Score: 0 of 1 pt 7.2.17 Save 6 of 14 (12 complete) ? HW Score: 64.76%, 9.07 of 14 pts Question Help A clinical trial tests a method designed to increase the probability of conceiving a gir n he study babies were bor and S ? of them were giri data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the resul does the method appear to be effective Usa sample

Explanation / Answer

Solution:- Given that n = 600 , X = 330

p = X/n = 330/600 = 0.55

q = 1-p = 1-0.55 = 0.45

Z = 2.576

=> 99% confidence interval estimate of the percentage of girls born
: p +/- Z*sqrt(pq/n)
: 0.55 +/- 2.576*srt(0.55*0.45/600)
: 0.498 , 0.602

  

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