(5 points) Do less agreeable Facebook users tend to spend more time on Facebook?

Question

(5 points) Do less agreeable Facebook users tend to spend more time on Facebook? A study (lvcevic and Ambady, 2013) aimed to investigate various facets of use of the social networking website Facebook. Previous research suggested that individuals with poorer face-to-face social skills may find internet-based social platforms less daunting, so as part of the study lvcevic and Ambady investigated whether an individual's volume of Facebook use was associated with levels of "agreeableness". The subjects were 99 university students who all had a Facebook page. The subjects agreed to allowing the content of their Facebook pages to be downloaded on six separate occasions over a three-week period. As part of the data gathered on each subject, each of the 99 were individually rated by a selected friend on an "agreeableness" scale (based on average ratings on a questionnaire where all responses were on a Likert scale), with 1 being "low" and 5 "high". We consider here the relationship between "friend reported" agreeableness and the number of words the subjects posted on their Facebook pages per day, as measured by an average word count over a subset of the six days. Suppose the data were as illustrated below

Explanation / Answer

Part (A)
Correct answer: option (E)

Part (B)
Lower bound = -12503 - 1.9845*2.032 = -12507.0325
Upper bound = -12503 + 1.9845*2.032 = -12498.9675

Part(C) Test statistic t = -12503 / 2.032 = -6153.0512
Here t value < t critical value, so we reject H0

Part (D) Correct Answer; option (E)

Part (E) Correct Answer; option (D)

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