Check My Work During the first 13 weeks of the television season, the Saturday e
ID: 3060664 • Letter: C
Question
Check My Work
During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M. audience proportions were recorded as ABC 29%, CBS 26%, NBC 23%, and independents 22%. A sample of 300 homes two weeks after a Saturday night schedule revision yielded the following viewing audience data: ABC 91 homes, CBS 62 homes, NBC 84 homes, and independents 63 homes. Test with = .05 to determine whether the viewing audience proportions changed. Use Table 12.4.
Round your answers to two decimal places.
2 =
p-value is between
- Select your answer -
less than .005
between .005 and .01
between .01 and .025
between .025 and .05
between .05 and .10
greater than .10
Item 2
.
Conclusion:
Select
There is a significant change in the viewing audience proportions.
There is no significant change in the viewing audience proportions.
Item 3
Explanation / Answer
applying chi square goodness of fit:
2 = 6.86
p-value is between between .05 and .10
There is no significant change in the viewing audience proportions.
observed Expected Chi square x Probability(p) Oi Ei=total*p R2i=(Oi-Ei)2/Ei ABC 0.290 91.000 87.0 0.18 CBS 0.260 62.000 78.0 3.28 NBC 0.230 84.000 69.0 3.26 independent 0.220 63.000 66.0 0.14 total 1 300 300 6.86