The results of a recent poll on the preference of shoppers

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The results of a recent poll on the preference of shoppers regarding two products are shown below.

Shoppers Favoring

Product

Shoppers Surveyed

This Product

A

800

560

B

900

612

  • The point estimate for the difference between the two population proportions is:
  • The standard error of pbar1 - pbar2 is (to 4 decimal places)
  • The 95% confidence interval estimate for the difference between the populations favoring the product is to   (to 3 decimal places)

Reference no: EM13620828

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