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3 weeks ago
Facebook In 2012, the Pew Research Center asked a random sample of Facebook users about their habits with this social media tool. One of the questions asked was about the plans people had for spending time on Facebook in the coming year. They were asked if they planned to more time, less time, or about the same time as now. Respondents were also broken into three age groups. Do these data provide evidence that age is independent of plans for Facebook time? Provide statistical justification for your answer. (www.pewinternet.org)
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Stats: Modeling the World


Edition: 4th
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Posts: 266
3 weeks ago
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Chi-square test for independence
H0: Age and planned Facebook time are independent .
HA: Age and planned Facebook time are not independent.
Sample is random, less than 10% of the population all the expecteds (97.9, 126, 138, 35.7, 46, 50.3, 5.4, 7, 7.6) are bigger than 5.
χ2 = 22.64; df = 4; p-value = 0.00015; a = 0.05
With a p-value of 0.00015 < 0.05, we reject Ho. We found statistically significant evidence that age and plans for time on Facebook are not independent.
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