Statisitcs:Two Sample Population Confidence Interval:

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1happyday

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Two Sample Population Confidence Interval: Before an intensive TV advertising campaign, the producers of Nike athletic shoes find that 30 of a random sample of 217 upper-income adults were aware of their new leisure shoe line. A second random sample of 352 such adults is taken after the campaign. Now 122 of the persons sampled can identity the new line. Give a 99% confidence interval for the increase in the proportion of upper income adults showing brand awareness.
 
What have you done? How far did you get? What are your thoughts? Where are you stuck?

Please reply showing all of your work and reasoning so far. Thank you.

Eliz.
 
1happyday said:
Two Sample Population Confidence Interval: Before an intensive TV advertising campaign, the producers of Nike athletic shoes find that 30 of a random sample of 217 upper-income adults were aware of their new leisure shoe line. A second random sample of 352 such adults is taken after the campaign. Now 122 of the persons sampled can identity the new line. Give a 99% confidence interval for the increase in the proportion of upper income adults showing brand awareness.
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10 questions - not a single line of work - must be a test
 
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