As part of locating a new factory, a company investigated the education and income of the local population. To keep costs low, the size of the survey of prospective employees was proportional to the size of the community. What possible problems for the SRM would you expect to find in a scatterplot of average income versus average education for communities of varying size?
Answer to relevant QuestionsA hasty analyst looked at the normal quantile plot for the residuals from the regression shown and concluded that the model could not be used because the residuals were not normally distributed. What do you think of this ...(a) If the observation marked with an “×” in the following plot is removed, how will the slope of the least squares line change? (b) What will happen to r2 and se? (c) Is this observation leveraged? Before plunging into videoconferencing, a company tested the speed of its internal computer network. The tests were designed to measure how rapidly data moved through the network under a typical load. Eighty files ranging in ...These data describe spending by a major pharmaceutical company for promoting a cholesterol-lowering drug. The data cover 39 consecutive weeks and isolate the area around Boston. The variables in this collection are shares. ...A marketing research analysis considered how two customer characteristics affect their customers’ stated desire for their product. Potential customers in a focus group were shown prototypes of a new convenience product and ...
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