Exhibit 11-5
The table below gives beverage preferences for random samples of teens and adults.
$\begin{array}{lrrr}&\text { Teens}&\text { Adults }&\text {Total }\
\text { Coffee } & 50 & 200 & 250 \
\text { Tea } & 100 & 150 & 250 \
\text { Soft Drink } & 200 & 200 & 400 \
\text { Other } & 50 & 50 & 100\
400&400&600&1,000
\end{array}$ We are asked to test for independence between age i.e., adult and teen) and drink preferences.
-Refer to Exhibit 11-5. With a .05 level of significance, the critical value for the test is
A) 1.645
B) 7.815
C) 14.067
D) 15.507

Question

Exhibit 11-5
The table below gives beverage preferences for random samples of teens and adults.
 $\begin{array}{lrrr}&\text { Teens}&\text { Adults }&\text {Total }\
\text { Coffee } & 50 & 200 & 250 \
\text { Tea } & 100 & 150 & 250 \
\text { Soft Drink } & 200 & 200 & 400 \
\text { Other } & 50 & 50 & 100\
400&400&600&1,000
\end{array}$ We are asked to test for independence between age i.e., adult and teen) and drink preferences.
-Refer to Exhibit 11-5. With a .05 level of significance, the critical value for the test is
A) 1.645
B) 7.815
C) 14.067
D) 15.507

Quizplus · Accepted Answer

The degrees of freedom for the test are (4-1)(2-1) = 3. At a 0.05 significance level, the critical value from the chi-square distribution table for 3 degrees of freedom is 7.815.

Exhibit 11-5 the Table Below Gives Beverage Preferences for Random

Exhibit 11-5
the Table Below Gives Beverage Preferences for Random