Chapter 11 Problem 5 Forbes reports that women trust recommendations from Pinterest more than recommendations from any other social network platform (Forbes website, April 10, 2012). But, does trust in Pinterest differ by gender? The following sample data show the number of women and men who stated in a recent sample that they trust recommendations made on Pinterest. a. What is the point estimate of the proportion of women who trust recommendations made on Pinterest? b. What is the point estimate of the proportion of men who trust recommendations made on Pinterest? c. Provide a 95% confidence interval estimate of the difference between the proportion of women and men who trust recommendations made on Pinterest. Interval estimate (.0809, .2791)
Problem 7 Minnesota had the highest turnout rate of any state for the 2012 Presidential election (United States Election Project website, February 9, 2013). Political analysts wonder if turnout in rural Minnesota was higher than turnout in the urban areas of the state. A sample shows that 663 of 884 registered voters from rural Minnesota voted in the 2012 Presidential election, while 414 out of 575 registered voters from urban Minnesota voted. a. Formulate the null and alternative hypotheses that can be used to test whether registered voters in rural Minnesota were more likely than registered voters in urban Minnesota to vote in the 2012 Presidential election. Ho: Rural voters = Urban voters Ha: Rural voters > Urban voters b. What is the proportion of sampled registered voters in rural Minnesota that voted in the 2012 Presidential election?
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- Spring '17
- Statistics, Null hypothesis, Statistical hypothesis testing, Statistical significance