Word Problems: Correlation #9

November 3, 2008 by  
Filed under Word Prob

You sell ice cream. You wonder if there is a relationship between flavors. To see if people who buy your chocolate ice cream also buy your mocha ice cream , you collect the following data from a sample of your customers (# of pints purchased).

Chocolate    Mocha
      10               10
      10                 4
        4                 5
        9                 7
      10                 1
        2                 2

What is the SS for Chocolate: ______
What is the range for Chocolate: ______
What is the SS for Mocha: ______
What is the SSxy: ______
Since you are interested in the relationship between two dependent variables, which of the following tests should you perform:

a. t-test
c. correlation
d. regression
e. multiple regression

Perform the comparison you selected in the item above. Select only the appropriate one(s). What was the result of your calculations?

a =  
b =
r =
t =
F =

Is this statistic significant (.05 alpha, 2-tailed):
Calculate the coefficient of determination:




Day 5: Correlation
    Bit More About Correlation
    Even More About Correlation
    Calculate Correlation
    Practice Problems
    More Practice Problems
    Word Problems
Sim1            Sim2             Sim3
        Sim4            Sim5             Sim6
        Sim7            Sim8             Sim9
    Basic Facts About Correlation
    Quiz 5


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