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1) How is correlation analysis used in a business decision?
2) What is the standard error of estimate? Describe with an example.
3) What are the coefficients of the linear regression model and what do they mean? What are the various statistics reported in a regression output?
4) How do outlying observations affect regression analysis?
A market researcher is interested in knowing the type of training that works best for DVD users. Thirty consumers are randomly selected from a population of known DVD owners (i.e., users).
You have been given a report that presents two regression models with different numbers of independent variables. You do not have the data so you cannot re computed regression models. Nevertheless, you have been asked to find out which model is b..
Testing for equality of variances - Independent random samples were taken from normal distributions of the yearly production of ships built by the International Ship Building Company under
Is there a difference in the extent of wound healing by treatment? (Hint: Are treatment and the percent wound healing independent?) Run the appropriate test at a 5% level of significance.
Multiple choice questions based on regression - A regression and correlation analysis resulted in the following information
These data are presented below. Should the manager be given an increase in staff? Why or why not? Please show your work.
A sample of 12 homes sold last week in St Paul, Minnesota, is selected. The results are shown below and create a scatterplot. Insert the trendline into the graph and show the regression equation.
In a regression model involving 30 observations, the following estimated regression equation was obtained:
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
Computing the expected values for the given probability distribution and evaluate the expected values of the following probability distributions
Oxytocin is a naturally occurring brain chemical that is nicknamed the "love hormone" because it seems to play a role in the formation of social relationships such as mating pairs and child-parent bonding.
Finding probability for the given values of the uniform density curve
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