Social networking is becoming more and more popular around the world. Pew Research Center used a survey of adults in several countries to determine the percentage of adults who use social networking sites (USA Today, February 8, 2012). Assume that the results for surveys in Great Britain, Israel, Russia and United States are as follows. Country Use Social Networking Sites Great Britain Israel Russia United States Yes 344 265 301 500 No 456 235 399 500 a. Conduct a hypothesis test to determine whether the proportion of adults using social networking sites equal for all four countries. Using a .05 level of significance.
1. assb12h_ch12_ex05a1.gif
2. assb12h_ch12_ex05a2.gif
3. assb12h_ch12_ex05a3.gif
Choose correct answer from above choice
- Select your answer -123Item 1
Ha: - Select your answer -All population proportions are equalNot all population proportions are equalItem 2
The p-value is - Select your answer -less than .01greater than .01Item 3
What is your conclusion?
- Select your answer -Conclude the population proportions are not all equal. Conclude the population proportions all are equal. Item 4
b. What are the sample proportions for each of the four countries? Round your answers to two decimal places.
Great Britain
Israel
Russia
United States
Which country has the largest proportion of adults using social networking sites?
- Select your answer -Great StatesItem 9
c. Using a .05 level of significance, conduct multiple pairwise comparison tests among the four countries. Round pi, pj and Diff to two decimal places. Round CVij to four decimal places.
Comparison pi pj Diff n1 n2 CVij Diff > CVij
GB vs I - Select your answer -YesNoItem 16
GB vs R - Select your answer -YesNoItem 23
GB vs USA - Select your answer -YesNoItem 30
I vs R - Select your answer -YesNoItem 37
I vs USA - Select your answer -YesNoItem 44
R vs USA
Mainly having trouble with CVij. Please help! Thank you!
- Select your answer -YesNoItem 51