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1. The total degrees of freedom for an experiment with n1= 10,n2= 12, and n3= 10 is ____.
2. By doing multiple t tests when there are more than 2 experimental groups we increase the risk of making what kind of mistake?
a) accepting Ho
b) Type I error
c) Type II error
d) all of the above
3. If X1=46, X2= 50, X3= 92 and n1=n2=n3, what is the value of Xg?
a) cannot be determined from information given
b) 50.0
c) 188.0
d) 62.67
Suppose 8 cups of coffee are served to a subject, where for each cup a coin is flipped to determine if regular or decaf coffee is poured.
Would it be appropriate to say the coefficient of determination (R-squared) is the proportion of variation in Y due to the variation within each of the categories of X?
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Suppose that sales of lemonade and sales of brownies are independent, determine standard deviation in his revenue.
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