Prior to an intensive TV advertising campaign, the producers of Nike athletic shoes find that 29 of a random sample of 200 upper-income adults are aware of their new leisure shoe line. A second random...

  Prior to an intensive TV advertising campaign, the producers of Nike athletic shoes find that 29 of a random sample of 200 upper-income adults are aware of their new leisure shoe line.  A second random sample of 300 such adults is taken after the campaign.  Now 96 of the persons sampled can identify the new line.

Is the increase in the proportion of upper income adults showing brand awareness significant?  Test the claim using alpha = .05.