GBA 334-Quiz

When both trend and seasonal components are present in time series, which of the following is most appropriate?
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A scatter diagram is a graphical depiction of the relationship between the dependent and independent variables.
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A scatter diagram is useful to determine if a relationship exists between two variables.
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A prediction equation for starting salaries (in $1,000s) and SAT scores was performed using simple linear regression. In the regression printout shown above, what can be said about the level of significance for the overall model?

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The significance level for SAT indicates the slope is equal to zero.

The significance level for the intercept indicates the model is not valid.

SAT is not a good predictor for starting salary.

None of the above can be said about the level of significance.

The significance level for SAT indicates the slope is not equal to zero.
Demand for a particular type of battery fluctuates from one week to the next. A study of the last six weeks provides the following demands (in dozens): 4, 5, 3, 2, 8, 10 (last week). What is the the forecast demand for the next week using a two-week moving average.
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A large school district is reevaluating its teachers’ salaries. They have decided to use regression analysis to predict mean teachers’ salaries at each elementary school. The researcher uses years of experience to predict salary. The resulting regression equation was:

Y = 23,313.22 + 1,210.89X, where Y = salary, X = years of experience

Based on this equation, by how much could a teacher expect his or her salary to increase for every additional tear of service?

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A large school district is reevaluating its teachers’ salaries. They have decided to use regression analysis to predict mean teachers’ salaries at each elementary school. The researcher uses years of experience to predict salary. The resulting regression equation was:

Y = 23,313.22 + 1,210.89X, where Y = salary, X = years of experience

Assume a teacher has ten years of experience.

What is the forecasted salary?

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When the significance level is small enough in the F-test, we can reject the null hypothesis that there is no linear relationship.
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Daily demand for newspapers for the last 10 days has been as follows: 12, 13, 16, 15, 12, 18, 14, 12, 13, 15 (listed from oldest to most recent). What are the forecast sales for the next day using a two-day moving average?
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A judgmental forecasting technique that uses decision makers, staff personnel, and respondents to determine a forecast is called:
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