You may need to use the appropriate technology to answer this question. Social networking is becoming more and more popular around the world. A survey was conducted of adults in several countries to determine the percentage of adults who use social networking sites. Assume that the results for surveys in Great Britain, Israel, Russia, and the United States are as follows. Use Social Networking Sites Country Great Britain (GB) Israel (I) Russia (R) United States (US) Yes 328 255 287 480 No 472 245 413 520 (a) Conduct a hypothesis test to determine whether the proportion of adults using social networking sites is equal for all four countries. State the null and alternative hypotheses. H0: Not all population proportions are equal. Ha: pGB = pI = pR = pUSH0: pGB = pI = pR = pUS Ha: All population proportions are not equal. H0: All population proportions are not equal. Ha: pGB = pI = pR = pUSH0: pGB = pI = pR = pUS Ha: Not all population proportions are equal. Find the value of the test statistic. (Round your answer to three decimal places.) What is the p-value? (Round your answer to four decimal places.) p-value = Using a 0.05 level of significance, what is your conclusion? Reject H0. We conclude that not all population proportions are equal.Do not reject H0. We conclude that not all population proportions are equal. Do not reject H0. We cannot conclude that not all population proportions are equal.Reject H0. We cannot conclude that not all population proportions are equal. (b) What are the sample proportions of people who use social networking sites for each of the four countries? pGB = pI = pR = pUS = Which country has the largest proportion of adults using social networking sites? Great BritainIsrael RussiaUnited States (c) Using a 0.05 level of significance, conduct multiple pairwise comparison tests among the four countries. (Round your answers for the critical values to four decimal places.) Comparison pi − pj CVij GB vs. I GB vs. R GB vs. US I vs. R I vs. US R vs. US Which comparisons show a significant difference? (Select all that apply.) Great Britain vs. IsraelGreat Britain vs. RussiaGreat Britain vs. United StatesIsrael vs. RussiaIsrael vs. United StatesRussia vs. United States
You may need to use the appropriate technology to answer this question. Social networking is becoming more and more popular around the world. A survey was conducted of adults in several countries to determine the percentage of adults who use social networking sites. Assume that the results for surveys in Great Britain, Israel, Russia, and the United States are as follows. Use Social Networking Sites Country Great Britain (GB) Israel (I) Russia (R) United States (US) Yes 328 255 287 480 No 472 245 413 520 (a) Conduct a hypothesis test to determine whether the proportion of adults using social networking sites is equal for all four countries. State the null and alternative hypotheses. H0: Not all population proportions are equal. Ha: pGB = pI = pR = pUSH0: pGB = pI = pR = pUS Ha: All population proportions are not equal. H0: All population proportions are not equal. Ha: pGB = pI = pR = pUSH0: pGB = pI = pR = pUS Ha: Not all population proportions are equal. Find the value of the test statistic. (Round your answer to three decimal places.) What is the p-value? (Round your answer to four decimal places.) p-value = Using a 0.05 level of significance, what is your conclusion? Reject H0. We conclude that not all population proportions are equal.Do not reject H0. We conclude that not all population proportions are equal. Do not reject H0. We cannot conclude that not all population proportions are equal.Reject H0. We cannot conclude that not all population proportions are equal. (b) What are the sample proportions of people who use social networking sites for each of the four countries? pGB = pI = pR = pUS = Which country has the largest proportion of adults using social networking sites? Great BritainIsrael RussiaUnited States (c) Using a 0.05 level of significance, conduct multiple pairwise comparison tests among the four countries. (Round your answers for the critical values to four decimal places.) Comparison pi − pj CVij GB vs. I GB vs. R GB vs. US I vs. R I vs. US R vs. US Which comparisons show a significant difference? (Select all that apply.) Great Britain vs. IsraelGreat Britain vs. RussiaGreat Britain vs. United StatesIsrael vs. RussiaIsrael vs. United StatesRussia vs. United States
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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You may need to use the appropriate technology to answer this question.
Social networking is becoming more and more popular around the world. A survey was conducted of adults in several countries to determine the percentage of adults who use social networking sites. Assume that the results for surveys in Great Britain, Israel, Russia, and the United States are as follows.
Use Social Networking Sites |
Country | |||
---|---|---|---|---|
Great Britain (GB) |
Israel (I) | Russia (R) | United States (US) |
|
Yes | 328 | 255 | 287 | 480 |
No | 472 | 245 | 413 | 520 |
(a)
Conduct a hypothesis test to determine whether the proportion of adults using social networking sites is equal for all four countries.
State the null and alternative hypotheses.
H0: Not all population proportions are equal.
Ha: pGB = pI = pR = pUSH0: pGB = pI = pR = pUS
Ha: All population proportions are not equal. H0: All population proportions are not equal.
Ha: pGB = pI = pR = pUSH0: pGB = pI = pR = pUS
Ha: Not all population proportions are equal.
Ha: pGB = pI = pR = pUSH0: pGB = pI = pR = pUS
Ha: All population proportions are not equal. H0: All population proportions are not equal.
Ha: pGB = pI = pR = pUSH0: pGB = pI = pR = pUS
Ha: Not all population proportions are equal.
Find the value of the test statistic. (Round your answer to three decimal places.)
What is the p-value? (Round your answer to four decimal places.)
p-value =
Using a 0.05 level of significance, what is your conclusion?
Reject H0. We conclude that not all population proportions are equal.Do not reject H0. We conclude that not all population proportions are equal. Do not reject H0. We cannot conclude that not all population proportions are equal.Reject H0. We cannot conclude that not all population proportions are equal.
(b)
What are the sample proportions of people who use social networking sites for each of the four countries?
pGB
=
pI
=
pR
=
pUS
=Which country has the largest proportion of adults using social networking sites?
Great BritainIsrael RussiaUnited States
(c)
Using a 0.05 level of significance, conduct multiple pairwise comparison tests among the four countries. (Round your answers for the critical values to four decimal places.)
Comparison |
|
CVij
|
||
---|---|---|---|---|
GB vs. I | ||||
GB vs. R | ||||
GB vs. US | ||||
I vs. R | ||||
I vs. US | ||||
R vs. US |
Which comparisons show a significant difference? (Select all that apply.)
Great Britain vs. IsraelGreat Britain vs. RussiaGreat Britain vs. United StatesIsrael vs. RussiaIsrael vs. United StatesRussia vs. United States.
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