10.4 Proportions

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Unformatted text preview: samples, what is the point estimate for the difference between the 2 population proportions (i.e., for D0)? Hypothesis Tests Market Research Associates is conducting research to evaluate the effectiveness of a client’s new advertising campaign. A survey conducted immediately after the new campaign showed 120 out of 250 households “aware” of the client’s product. Before the new campaign began, a telephone survey of 150 households in the test market area showed 60 households “aware” of the client’s product. Difference Between 2 Population Proportions parameter D = p1 – p2 point estimator d p− 2 =1 p p( −p) p ( −p ) standard 11 1 21 2 σ= + error d n n 1 2 p( −p) p ( −p ) margin of 11 1 21 2 z2 + error α n n 1 2 p( −p) p( −p) interval 11 1 21 2 d±z 2 + α estimate n n 1 2 Example Given these samples, what is the point estimate for the difference between the 2 population proportions (i.e., for D0)? Hypothesis Tests d = pBefore Market Research pAfter Associates is conducting 60 = 150 - 120 research to evaluate the 250 effectiveness of a client’s new = campaign. A advertising0.4 - 0.48 survey conducted = - after immediately .08 the new campaign showed 120 out of 250 households “aware” of the client’s product. Before the new campaign began, a telephone survey of 150 households in the test market area showe...
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This document was uploaded on 03/05/2014.

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