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You are interested in whether children from low SES families eat as healthy as the average child in the U.S. You

sample a group of 16 children from low SES families and give them a reliable and valid measure of healthy habits, with higher scores indicating higher levels of healthy habits. We want to know if these children come from the general population of children in terms of healthy habits at the α = .05 level.


μ = 9    σ = 4


M= 6


a.    State your research hypothesis.



b.    What type of statistical test is best to answer this question?


c.    State your statistical hypotheses.


d.    What is your criterion for rejection? What are your critical values?


e.    Calculate your test statistic. 


f.     What is your decision in regards to H0?



g.    What is your interpretation?  What can we say about children from low SES families? 

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