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Mathematics, 21.04.2020 22:40 maddy3lizabeth

2) The results of a 2012 Pew Foundation survey of high school and middle school teachers is given in the pie chart. A student asked a random sample of teachers in 2018 and found 165 had smart-phones, 80 had a cell phone other than smart-phones, and 5 had no cell phone. Is there a difference in the distribution of types of cell phones for the teachers in 2018 at a 5% level of significance?

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