Question

A survey asked, “How effective do you think you are in talking with your children about drinking?” Responses are in the table below:

	Age of Children
Response	Under 13 yrs old	13 yrs and OVer	Total
Very Effective	100	130	230
Somewhat Effective	40	50	90
Not Effective	50	30	80
Total	190	210	400

Suppose you want to do a test, with a significance level of .05, to determine whether there is an association between age of children and parental response. Choose the appropriate range for the value of the test statistic for this test?

a) 1.000–4.999

b)5.000–7.499

c)7.500–9.999

d)> 10.000

What is the appropriate degrees of freedom for this test?

a) 1

b) 2

c) 3

d) 6

Answer 1

The statistical software output for this problem is:

Contingency table results:
Rows: Response
Columns: None

	Under 13 yrs old	13 yrs and OVer	Total
Very Effective	100	130	230
Somewhat Effective	40	50	90
Not Effective	50	30	80
Total	190	210	400

Chi-Square test:

Statistic	DF	Value	P-value
Chi-square	2	9.0467715	0.0109

Hence,

Appropriate range of test statistic:

7.500 - 9.999

Option C is correct.

Appropriate degrees of freedom = 2

Option B is correct.