a. Conduct a hypothesis test to determine whether the proportion of adults using
ID: 3219030 • Letter: A
Question
a. Conduct a hypothesis test to determine whether the proportion of adults using social networking sites is equal for all four countries. Using a .05 level of significance.
Choose correct answer from above choice
-SELECT ANSWER-
1
2
3
Ha: -Select you answer-
less than .01
greater than .01
What is your conclusion? -Select you answer-
Conclude the population proportions are not all equal
Conclude the population proportions all are equal
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 Britain
Israel
Russia
United States
Use Social Networking Sites Yes No Great Britain 344 456 Country Israel Russia 265 301 399 United States 500 500Explanation / Answer
a)clearly option 2-p1=p2=p3=p4.
b)
Israel
DF=4-1=3.
P VALUE= 0.0001 <0.05 reject H0 and conclude 4 population proportions are not equal.
SAMPLE PROPORTIONS
Great Britain=800/3000=0.27
Israel=500/3000=0.17.
Russia=0.23(700/3000)
USA=0.33(1000/3000)
d)Total social networking user proportion in each country.
Great briain proportion=344/800=0..43
Israel=265/500=0.53
russia=301/700=0.43
usa=500/1000=0.5
So israel it is greatest largest proportion of adults using social networking sites.
USAGE COUNTRY OBSERVED EXPECTED DIFFERENCE SQUARED DIFFERENCE (SQUARED DIFF)/EXPECTED. YES Britain 344 376 -32 1024 2.72 YESIsrael
265 235 30 900 3.83 Yes Russia 301 329 -28 784 2.38 Yes USA 500 470 30 900 1.91 no BRITAIN 456 424 32 1024 2.41 NO ISRAEL 235 265 -30 900 3.34 NO RUSSIA 399 371 28 784 2.11 NO USA 500 530 -30 900 1.69 TOTAL 3000 3000 chi square value 20.39.Related Questions
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