QUESTION: How are null values treated when one or more appears during the execution of a group function?

QUESTION: The city government has collected the following data on annual sales tax collections and new car registrations: Determine the following: (a) The least-squares regression equation. (b) Using the results of part (a), find the estimated sales tax collections if …

QUESTION: “Which forecasting technique can place the most emphasis on recent values? How does it do this?”

QUESTION: If every new product goes through a product cycle, will the technological initiator (e.g.. the United States or Japan) eventually develop chronic overall “trade deficits”?

QUESTION: “A country whose trade has almost no impact on world prices is at great risk of immiserizing growth.” Do you agree or disagree? Why?

QUESTION: “For my country, imports are a good thing about international trade, whereas exports are more like the necessary evil.” Do you agree or disagree? Why?

QUESTION: Consider again Figure 2.3, which shows free trade in motorbikes. Assume that U.S. productivity in producing motorcycles increases. What is the effect on the U.S. domestic demand and/or supply curve(s)? What is the effect on the U.S. demand-for-imports curve? …

QUESTION: A logistic regression model describes how the probability of voting for the Republican candidate in a presidential election depends on x, the voter’s total family income (in thousands of dollars) in the previous year. The prediction equation for a …

QUESTION: Refer to the previous exercise. For what weight values do you estimate that a female crab has the probability (a) 0.50, (b) Greater than 0.50, and (c) less than 0.50, of having a male partner nesting nearby?

QUESTION: Refer to Example 11 and Exercise 13.40, with ŷ = predicted winning the high jump and x1 = number of years since 1928. When equations are fitted separately for males and for females, we get ŷ = 1.98 + …