Your investment executive claims that the average yearly rate of return on
the stocks she recommends is at least 10.0%. You plan on taking a sample
to test her claim. State the null and the alternative hypotheses. The correct
set of hypotheses is __________. (5%)
In a multiple regression analysis involving 12 independent variables and
166 observations, SSR = 878 and SSE = 122. The coefficient of
determination is __________. The adjusted multiple coefficient of
determination is __________. (10%)
In a regression analysis involving 18 observations and four independent
variables, the following information was obtained.
Multiple R = 0.60; R Square = 0.36; Standard Error = 4.80
Based on the above information, the computed F statistic for testing the
significance of the regression model is __________. (5%)
An advertising firm wants to know whether the size of an advertisement
and the color of the advertisement make a difference in the response of
magazine readers. A random sample of readers is shown ads of four
different colors and three different sizes. Each reader is asked to give the
particular combination of size and color a rating between 1 to 10. Assume
that the ratings follow the normal distribution. The rating for each
combination is shown in the following table (for example, the rating for
small red ad is 2). The advertising firm wants to study whether the
effectiveness of an advertisement by color and by size is different or not.
(Level of significance α = 0.05 )
可觀看題目詳解,並提供模擬測驗!(免費會員無法觀看研究所試題解答)