MATH 1330 EXTRA CREDIT (2)

MATH 1330 EXTRA CREDIT (2) - d) d1) H0: population...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
1) a) the parameter p explains the proportion of students who preferred brand A. When we multiply this by 100, it gives us the value in percentage that is the percentage of students who preferred brand A. b) phat=29/49=0.59. c) 99% confidence interval is given by phat±z aphla/2 sqrt(p*(1-p)/n) n=49, p=0.59, z aphla/2 =2.57 substituting we get 0.59 0.18=(0.41,0.77)
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: d) d1) H0: population proportion is 0.5 ie 50% of students preferred brand A H1: population propeotion is greater than 0.5, tht is more than 50% students preferred brand A. D2) test statistic Z=p-p0/ sqrt(p*(1-p)/n) Z=1.26 D3) p=0.1038 D4) since p value is greater than 0.05, we accept the null hypothesis and conclude that p=0.5...
View Full Document

This note was uploaded on 12/04/2011 for the course ECONOMICS 201 taught by Professor Rcollier during the Spring '10 term at Portland CC.

Ask a homework question - tutors are online