Question

Last rating period, the percentages of views watching several channels between 11 p.m. and 11:30 p.m. In a major TV market were as follows:
WDUX
(News)
WWTV
(News)
WACO (Cheers Reruns)
WTJW (News)
Others
15%
19%
22%
16%
28%
Suppose that in the current rating period, a survey of 2,000 views gives the following frequencies:
WDUX
(News)
WWTV
(News)
WACO (Cheers Reruns)
WTJW (News)
Others
182
536
354
151
777
a. State the null and alternative hypotheses
b. What is the test statistic?
c. Using a .05 significance level, what is the decision rule?
d. Show the test statistic and essential calculations.
e. Interpret you results

Answer 1

a. State the null and alternative hypotheses
Ho   Current ratings differ from that of the last rating period
H1   Current ratings is same as the last rating period

b. What is the test statistic?
Chi square = 301

c. Using a .05 significance level, what is the decision rule?
Reject null hypothesis if the chi square is greater than critical value = 14.44

d. Show the test statistic and essential calculations.
shown below
e. Interpret your results
We have sufficient evidence to support the claim that the Current ratings differ from that of the last rating period