The Pew Research Center conducted a survey of randomly sampled American adults in 2008 and in 2010, asking them about their use of social networking sites such as Facebook. Table 7.31 shows age groups of social networking site users in 2008 and in 2010. Did the age distribution change significantly in the two-year time span? Show all details of the test.

Table 7.31

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2008 Total ȚAge/Year→ 2010 152 18–22 23-35 36–49 138 290 197 303 500 354 108 246 50+ Total 52 495 246 298 947 1442