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. The test statistic for this test of independence is
A) 0
B) 8.4
C) 62.5
D) 82.5

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. The test statistic for this test of independence is
A) 0
B) 8.4
C) 62.5
D) 82.5

Quizplus · Accepted Answer

The chi-square test statistic for this test of independence is 62.5. This is calculated by summing the squared differences between the observed and expected frequencies, and then dividing by the expected frequencies. The expected frequencies are calculated by multiplying the row and column totals and dividing by the grand total.

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

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