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Between 2008 and 2011, the age distribution of users of social networking sites such as Facebook changed dramatically. In 2008, 70 % of users were 35 years old or younger. In 2011, the age distribution was much more spread out. The table below shows the age distribution of 975 users of social networking sites from a survey reported in June 2011.1 Age 18 – 22 23 – 35 36 – 49 50 – 65 65 + Frequency 156 312 253 195 59 Table 1 Age distribution of users of social networking sites

Between 2008 and 2011, the age distribution of users of social networking sites such as Facebook changed dramatically. In 2008, 70 % of users were 35 years old or younger. In 2011, the age distribution was much more spread out. The table below shows the age distribution of 975 users of social networking sites from a survey reported in June 2011.1 Age 18 – 22 23 – 35 36 – 49 50 – 65 65 + Frequency 156 312 253 195 59 Table 1 Age distribution of users of social networking sites

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 4BGP
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Test an assumption that users are equally likely to be in each of the five age groups.

Calculate the chi-square statistic and the p-value.

Round your answer for the chi-square statistic to two decimal places, and your answer for the p-value to three decimal places.

Between 2008 and 2011, the age distribution of users of social networking sites such as Facebook changed dramatically. In 2008, 70 % of users were 35 years old or younger. In 2011, the age distribution was much more spread out. The table below shows the age distribution of 975 users of social networking sites from a survey reported in June 2011. Age 18 – 22 23 – 35 36 –- 49 50 – 65 65 + Frequency 156 312 253 195 59 Table 1 Age distribution of users of social networking sites
Transcribed Image Text:Between 2008 and 2011, the age distribution of users of social networking sites such as Facebook changed dramatically. In 2008, 70 % of users were 35 years old or younger. In 2011, the age distribution was much more spread out. The table below shows the age distribution of 975 users of social networking sites from a survey reported in June 2011. Age 18 – 22 23 – 35 36 –- 49 50 – 65 65 + Frequency 156 312 253 195 59 Table 1 Age distribution of users of social networking sites
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