The results of a recent poll on the preference of shoppers r…

The results of a recent poll on the preference of shoppers regarding two products are shown below.ProductShoppers SurveyedShoppers FavoringThis ProductA800560B900612 The point estimate for the difference between the two population proportions in favor of this product (Product A – Product B) is _____.

Dean of students affairs at ACME University wants to make a…

Dean of students affairs at ACME University wants to make a CI for the proportion of students who cheat.  What is the minimum sample size required to do this if the width of the interval is to be no more than 0.04 and she thinks the students fairly honest, and that probably no more than 8% really cheat.

A political scientist is studying the impact of a political…

A political scientist is studying the impact of a political debate between candidates for governor in small western states. The scientist wants to evaluate the proportion of registered voters who switch their preference after viewing the debate. The following table contain the data from 75 registered voters. PreferenceBefore Debate PreferenceAfter Debate Total(Before Debate) Candidate A  Candidate B Candidate A  30 11 41 Candidate B 4 30 34 Total(After Debate) 34 41 75 At alpha=0.05 do we have enough evidence to conclude that lower proportion of people like candidate A after the debate compared to the proportion of people who liked candidate A before the debate.