557 market area showed 60 householdsz z05 1645 aware

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ta indicate a difference in the proportion of households aware of the product after the advertising campaign? Hypothesis Tests Market Research Associates Difference Between 2 Population Proportions is conducting research to evaluate the effectiveness of a p −p 1 2 zSTAT = Hypotheses: client’s new advertising test 1 1 H0: pBefore – pAfter ≥ 0 statistic campaign. A survey conducted p( − p) + 1 n n2 1 immediately pBefore – pAfter < 0 Ha: after the new H0: p1 – p2 ≤ 0 campaign showed 120 out of upper Hp p2 > 250 households “aware” of the Decision Rule (critical value): tail test rejecta: 0 1 – STAT0 zα H if z > client’s product. Reject H0 if zSTAT < zα Before the new campaign H0: p1 – p2 ≥ 0 began, a telephone survey of lower tail Ha: p1 – p2 < 0 150Statistical Decision: households in the test test reject H0 if zSTAT ≤ –zα market area showed 60 –1.557 zSTAT = households “aware” of the H0: p1 – p2 = 0 twoclient’s product. Ha: p1 – p2 ≠ 0 tailed Can we conclude using a .05 reject H0 if zSTAT ≤ – test zα/2 or if zSTAT > zα/2 level of significance that the proportion...
View Full Document

This document was uploaded on 03/05/2014.

Ask a homework question - tutors are online