The table below gives beverage preferences for random samples of teens and adults. $$\begin{array} { l l l l }
& \text { Teens } & \text { Adults } & \text { Total } \
\text { Coffee } & 50 & 200 & 250 \
\text { Tea } & 100 & 150 & 250 \
\text { Soft Drink } & 200 & 200 & 400 \
\text { Other } & 50 & 50 & 100 \
& 400 & 600 & 1000
\end{array}$$ We are asked to test for independence between age (i.e., adult and teen) and drink preferences.The expected number of adults who prefer coffee is
A) .25.
B) .33.
C) 150.
D) 200.

Question

The table below gives beverage preferences for random samples of teens and adults. $$\begin{array} { l l l l } 
& \text { Teens } & \text { Adults } & \text { Total } \
\text { Coffee } & 50 & 200 & 250 \
\text { Tea } & 100 & 150 & 250 \
\text { Soft Drink } & 200 & 200 & 400 \
\text { Other } & 50 & 50 & 100 \
& 400 & 600 & 1000
\end{array}$$  We are asked to test for independence between age (i.e., adult and teen) and drink preferences.The expected number of adults who prefer coffee is
A) .25.
B) .33.
C) 150.
D) 200.

Quizplus · Accepted Answer

The expected number is calculated by (Row Total * Column Total) / Grand Total = (250 * 600) / 1000 = 150.

The Table Below Gives Beverage Preferences for Random Samples of Teens