Questions on making inferences from frequency data 1 one var

Questions on making inferences from frequency data:

1.) \"one variable case\" is to \"goodness of fit\" as

a. \"two variable case\" is to \"bivariate frequency distribution\"

b. \"two varialbe case\" is to \"Pearson r\"

c. \"two variable case\" is to \"independence\"

d. \"two variable case\" is to \"rows and cloumns\"

2.) the use of X² is appropriate only when

a. the data are in the form of frequencies

b. the alternative hypothesis is nondirectional

c. one is working with nominal variables

d. the observed frequencies are equal.

3.) The X² test is like analysis of variance in that

a. it can be used when there are more than two subgroups to be compared.

b. it can be used to examine discrepancies between subgroup means.

c. both may be used to answer questions about qualitative variables.

d. all of the above are true.

4.) We wish to test the null hypothesis that students guess at random on a particular 4-option multiple choice item. The choices for a random sample of 24 students are:

f_o : (1) (2) (3) (4)   

3 9 2 10

The value of f_e for alternative (2) is    

a.     5   

b.     9   

c.     7   

d.     6

5.) The frequencies of right and wrong answers given by a sample of students to a particular 4-option multiple choice item are 12 and 20 respectively. Under the hypothesis that the students guessed randomly, the value of \"f_e\" for right answers is

a. 8

b. 12

c. 2

d. 6

Solution

1. c

2. c

3. a

4. b

5. b