5. A researcher reports that her obtained chi square of -17.56 is significant be

Question

5. A researcher reports that her obtained chi square of -17.56 is significant because it exceeds the critical Chi square of -3.841 for an alpha of .05 with 2 degrees of freedom. What mistake has been made?              

a. neither critical nor obtained Chi squares can have negative values

           b. it is impossible to have only 2 degrees of freedom

           c. it is impossible for obtained Chi square to exceed 10

           d. a one-tailed test should have been used

6. In the Chi square test, expected frequencies are computed by                                                                    

a. adding the observed frequency to N and subtracting the number of cells

b. multiplying the observed frequencies by the row marginals and dividing by degrees of freedom

c. multiplying the proper row and column marginals for each cell and dividing by N

d. adding the proper row and column marginals together and dividing by N

3. How many degrees of freedom does a 3 x 3 bivariate table have?                                                              

a. 8

           b. 6

           c. 4

d. 3

Explanation / Answer

5) (a). Neither critical nor obtained Chi squares can have negative values

6) (c). Multiplying the proper row and column marginals for each cell and dividing by N.

3) Degrees of freedom for a 3 x 3 bivariate table have 4.

D.F = (r - 1)(c - 1)

D.F = (3 - 1)(3 - 1)

D.F = 2 × 2

D.F = 4

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