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Think of an example of a family member or friend who has experienced intergenerational mobility. Was it upward or downward mobility? Tell us about the change.
Use the most appropriate model to forecast daily stock price for March 1, 2011.
Fit the simple linear model to the data. Is the model statistically useful for predicting monthly sales?- Construct a plot of the regression residuals against month, t. Does the plot suggest the presence of residual correlation? Explain.
Let X1 and X2 be uncorrelated random variables. Find the correlation p(Y1, Y2) between the random variables Y1 = X1 + X2 and Y2
The mean monthly expenditure on gasoline per household in Middletown is determined by selecting a random sample of 36 households. The sample mean is $68 with a random sample standard deviation of $17.?Calculate a 90% confidence interval for the me..
1.a statistics instructor wants to know which route will get her to school the fastest. each day from october 2 to
1.using your own words what is statistical variability? why is it important for researchers to understand the
Deciding on the number of observations to include in a sample is an important decision when planning a reasearch study. What information is required to make this descision
if your anova hypothesis test shows no interaction between two factorsa you must re-run the anova in minitab without
You are trying to determine whether male and female Central Bank employees, having equal qualifications, receive different salaries. The data contain the salaries (in thousands of dollars) for 9 male and 9 female employees. Assume salaries are nor..
Explain the difference between testing a single mean and testing the difference between two means. What two assumptions must be met when one is using z test to test differences between two means?
a. If a night crew consists of 3 machinists, how many different crews are possible? b. If the machinists are ranked 1, 2,... , 20 in order of competence, how many of these crews would not have the best machinist? c. How many of the crews would have a..
For one consumer product the mean dollar sales per retail outlet last year in a sample of 15 was $3,425 with a standard deviation of $500. For a second product the mean dollar sales per outlet in a sample of 12 stores was $3,250 with a standard de..
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