From a Poll of 800 Television Viewers, the Following Data

question 78

Essay

From a poll of 800 television viewers, the following data have been accumulated as to their levels of education and their preference of television stations. We are interested in determining if the selection of a TV station is independent of the level of education.
Educational Level

$\begin{array}{rrrrr}&\text { High School } & \text { Bachelor } &\text { Graduate }& \text { TOTAL }\\\text { Public Broadcasting } & 50 & 150 & 80 & 280 \\\text { Commercial Stations } & 150 & 250 & 120 & 520\\\text { TOTAL } & 200 & 400 & 200 & 800\end{array}$
a. State the null and the alternative hypotheses.
b. Show the contingency table of the expected frequencies.
c. Compute the test statistic.
d. The null hypothesis is to be tested at 95% confidence. Determine the critical value for this test.
e. Determine the p-value and perform the test.

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Definitions:

Task Groups

Teams formed for the specific purpose of completing a particular project or assignment.

Agenda Columns

A structured list or schedule of topics and activities arranged by time or priority for discussion in meetings.

Communication

The process of exchanging information, ideas, or feelings between people through speaking, writing, or using some other medium.

Guarded

Involving careful and cautious behavior or actions.