Word Problems: t-Test #4

#4

The newspapers have made your depression/sugar studies famous, but you are interested in exploring it further. You randomly assign patients to two treatment groups, and neither you nor they know whether they are receiving sugar-water or plain water intravenously. Consider the following data (how depressed they are):

            Sugar              NoSugar
               9                        3
               7                        7
               6                        4
             16                        5
               4                        6
               8                        7
             14                        3
               8                        3

What is the median for Sugar:  

What is the mean for Sugar:    

What is the SS for Sugar:   

What is the mode for NoSugar:  

What is the SS for NoSugar:  

Since you are interested in which group did best, which of the following tests should you perform:

a. t-test
b. ANOVA
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 calculation?

a =

b =

r =

t = 

F =

What is the critical value for t (.05 alpha level, two-tailed):  

Is there a significant difference between subjects treated with sugar and those not given sugar: 

 

Answers

 

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    Day 8: Student’s t-Test
    Bit More About t-Test
    Even More About t-Test
    How to Calculate t-Test
    Practice Problems
    More Practice Problems
    Word Problems
        Sim1           Sim2            Sim3
        Sim4           Sim5            Sim6
        Sim7           Sim8            Sim9
    Basic Facts About t-Test
    Vocabulary
    Formulas
    Quiz 8
    Summary