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Unformatted text preview: oclient’s product.
Therefore, zSTAT.05 zα and tailed reject Hp1if–zp2 ≠ 0≤ –
Can we conclude using a
test zα/2 or if zSTAT > zα/2
H0 is that rejected.
level of significance not the
proportion of households aware Example Do the data indicate a difference in
the proportion of households aware
of the product after the advertising
campaign? Hypothesis Tests Market Research Associates
Difference Between 2
is conducting research to
evaluate the effectiveness of a
client’s new advertising
H0: pBefore – pAfter ≥ 0 statistic
campaign. A survey conducted
p( − p) + 1 n n2 1
immediately pBefore – pAfter < 0
Ha: after STAT test statistic:
H0: p1 – p2 ≤ 0
campaign showed 120 out of
Ha: p1 – p2 > 0
250Decision “aware” of the
households pooled estimate:
n1 p1 + n 2 p2 n After pAfter + n Before pBeforereject H0 if zSTAT &...
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This document was uploaded on 03/05/2014.
- Spring '13