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hand calculation. please show all works. A researcher classifies a group of people into three age...

hand calculation. please show all works.

  1. A researcher classifies a group of people into three age groups and measures whether each person used Facebook during the previous week (yes/no). The researcher uses a chi-square test for independence to determine if there is a significant relationship between the two variables. If the researcher obtains ?2= 6.75, then what is the correct decision for the test?
    1. Reject ?? for α = 0.05 but not for α = 0.01.
    2. Reject ?? for α = 0.01 but not for α = 0.05.
    3. Reject ?? for either α = 0.05 or α = 0.01.
    4. Fail to reject ?? for α = 0.05 and α = 0.01.

math   Statistics-And-Probability   
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