What are the assumptions made by the regression model in estimating the parameters and in significance testing?
What will be an ideal response?
1. The error term is normally distributed. For each fixed value of X, the distribution of Y is normal.
2. The means of all these normal distributions of Y, given X, lie on a straight line with slope b.
3. The mean of the error term is 0.
4. The variance of the error term is constant. This variance does not depend on the values assumed by X.
5. The error terms are uncorrelated. In other words, the observations have been drawn independently.
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Which system combines digitized mapping with key locational data?
a. geographic information system b. primary trading-area analysis c. secondary trading-area analysis d. TIGER
Research evidence suggests that one reason many people are hesitant to speak up when part of a group is that if we think that
A) others in the group are smarter, our problem-solving ability is suppressed a little. B) we are smarter than others in the group we do not want to show off. C) others in the group are less intelligent, they will not be understood. D) others are not contributing fairly, they do not want to do most of the work.