Which of the following interpretations is/are valid? I. A manager wants to predict the cost of travel for salespeople (in US$) based on the time spent (in dars on each sales trip. The following model has been developed: Y = 400 + 120x. If a salesperson did not take a trip (assuming it is within the x-data range), then the expected cost of travel for that sales person is $400. II. Regression analysis was applied to return rates of sparrow hawk colonies. A study on the relationship between return rate (x: % of birds that return to the colony per year) and immigration rate (y: % of new adult birds that join the colony per year) yielded the following regression equation: Y = 31.9-0.34x. Based on the estimated regression equation, if the return rate were to decrease by 1%, the rate of immigration to the colony would on the average increase by 0.34%. O l only O Il only O Neither I nor II O Both I and II
Which of the following interpretations is/are valid? I. A manager wants to predict the cost of travel for salespeople (in US$) based on the time spent (in dars on each sales trip. The following model has been developed: Y = 400 + 120x. If a salesperson did not take a trip (assuming it is within the x-data range), then the expected cost of travel for that sales person is $400. II. Regression analysis was applied to return rates of sparrow hawk colonies. A study on the relationship between return rate (x: % of birds that return to the colony per year) and immigration rate (y: % of new adult birds that join the colony per year) yielded the following regression equation: Y = 31.9-0.34x. Based on the estimated regression equation, if the return rate were to decrease by 1%, the rate of immigration to the colony would on the average increase by 0.34%. O l only O Il only O Neither I nor II O Both I and II
Chapter4: Linear Functions
Section4.3: Fitting Linear Models To Data
Problem 34SE: For the following exercises, consider this scenario: The profit of a company decreased steadily...
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Transcribed Image Text:Which of the following interpretations is/are valid?
I. A manager wants to predict the cost of travel for salespeople (in US$) based on the time spent (in delon
each sales trip. The following model has been developed: Y
a trip (assuming it is within the x-data range), then the expected cost of travel for that sales person is $400.
400 + 120x. If a salesperson did not take
II. Regression analysis was applied to return rates of sparrow hawk colonies. A study on the relationship
between return rate (x: % of birds that return to the colony per year) and immigration rate (y: % of new adult
birds that join the colony per year) yielded the following regression equation: Y
the estimated regression equation, if the return rate were to decrease by 1%, the rate of immigration to the
31.9-0.34x. Based on
colony would on the average increase by 0.34%.
O l only
O Il only
Neither I nor II
Both I and II
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