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Write the equation of this adjusted line and describe how the least-squares line changed when the outier was deleted.
a) Plot these data and decide if a linear model is reasonable. b) Develop a regression relationship.
Estimate a multiple regression with trend and seasonal dummy variables. Predict gasoline consumption for every quarter in the fourth year.
ne-fourth of the residents of the Burning Ridge Estates leave their garage doors open when they are away from home.
What is sampling error? Could the value of the sampling error be zero? If it were zero, what would this mean?
Consider a normally distributed process that cuts wood with a "process center" of 18 inch and a standard deviation of .08 inches.
If we select a random sample of 50 households, what is the standard error of the mean?
For output equal to forecasted demand, what is the % idle time and efficiency of this line if tasks are assigned to workstations using the longest task time.
What statistic would you use to describe each aspect of the "typical" home? You might use the MEAN for price, the MEDIAN for square footage, the MODE for ...
What should be considered in selecting an appropriate forecasting method? What do you think about combining statistical forecasts and judgment?
Consider the 'last process' of manufacturing a car. The last two things that are done to a car before its manufacture is complete.
Using the .05 level of significance: a. Is there a difference among types of gasoline? b. Is there a difference in the cars
Does the breakfast revenue seem to increase as the number of occupied rooms increases? Draw a scatter diagram to support your conclusion.
Consider the following actual and forecast demand levels for Big Mac hamburgers at a local McDonald's restaurant.
Consider the control chart shown here. Does the pattern appear random? Apply the Western Electric rules to the control chart presented.
Using the data for computer and electronic products, develop a three-period MA(3), four-period MA(4), and five-period MA(5) moving average forecasts.
What is the average waiting time in the queue (in hours) before the technician answers a customer's call?
Consider the following research question: Are there differences between rural and urban children's attitudes regarding diversity?
What do confidence intervals represent? What is the most controllable method of increasing the precision (narrowing) of the confidence interval?
Suppose that 100 users have unique three-character passwords and the hacker randomly selects three-character passwords.
Calculate the scheduled completion time and identify the critical path. What is the slack time (float) for activities A, D, E, and F?
What are some differences between discrete and continuous data? Is the measurement of money continuous or discrete? Explain.
What are the practical implications of interpreting regression results when this assumption, known as multicollinearity, is violated?
A construction project is broken down into the following 10 activities: a. Find the critical path.
Prepare a 3-page report using Excel as your processing tool to process 3 simple regression analyses.