The authors of the paper Is It Really About Me? Message Content in Social Awareness Streams (Computer

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The authors of the paper €œIs It Really About Me? Message Content in Social Awareness Streams€ (Computer Supported Cooperative Work 2010) studied a random sample of 350 Twitter users. For each Twitter user in the sample, the tweets sent during a particular time period were analyzed and the Twitter user was classified into one of the following categories based on the type of messages they usually sent:
The authors of the paper €œIs It Really About Me?

The accompanying table gives the observed counts for the five categories (approximate values from a graph in the paper).

The authors of the paper €œIs It Really About Me?

Carry out a hypothesis test to determine if there is convincing evidence that the proportions of Twitter users falling into each of the five categories are not all the same. Use a significance level of 0.05.

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