Exhibit 12-5
The table below gives beverage preferences for random samples of teens and adults. We are asked to test for independence between age (i.e., adult and teen) and drink preferences.
-Refer to Exhibit 12-5. The expected number of adults who prefer coffee is
A)0.25
B)0.33
C)150
D)200

Question

Exhibit 12-5
The table below gives beverage preferences for random samples of teens and adults.  We are asked to test for independence between age (i.e., adult and teen) and drink preferences.
-Refer to Exhibit 12-5. The expected number of adults who prefer coffee is
A)0.25 
B)0.33 
C)150 
D)200

Quizplus · Accepted Answer

To find the expected number of adults who prefer coffee, we need to first calculate the total number of respondents who prefer coffee (which is 450) and then find the proportion of adults in the sample (which is 0.333).

Expected number of adults who prefer coffee = Total number of respondents who prefer coffee * Proportion of adults in the sample

= 450 * 0.333

= 150

Therefore, the expected number of adults who prefer coffee is 150.

Exhibit 12-5 the Table Below Gives Beverage Preferences for Random Samples of Samples