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Financial advising
Dealing with a large collection of categories complicates a regression, and software does not always provide the needed tools. The follow- ing procedure is often helpful. Rather than add State to the regression (as in the previous question), save the residuals from the model in Table 4. Then use a one-way analysis of variance (ANOVA) to discover whether the average residual in any pair of states is statistically significantly different.
(a) Does the F-statistic of the one-way ANOVA detect a statistically significant difference among the averages? Does the result differ from the partial F obtained by adding State directly to the regression? Explain.
(b) Do any pairs of states have statistically signifi- cantly different means? With so many compari- sons, be sure to use an appropriate adjustment for multiple comparisons.
(c) How could you incorporate these differences into the regression model without adding the 50 coef- ficients needed to represent State?
Define X as the number of people in the sample who are infected by the diease. What is the distribution of X and what are the parameter values of this distribution?
Your friend also takes the test and obtains a score of 161.42 and is told that he is in the 22.8th percentile. What is overall mean and standard deviation of the test scores?
The null hypothesis is that there was no change in average liquor consumption. State this formally in terms of µ.
a random sample of 21 ncaa division i mens basketball games during the 2009-2010 season had an average attendance of
among 18 patients with depression the mean number of treatment days was 4.7 with a standard deviation of 9.3. for 10
assume that iq scores are normally distributed with a standard deviation of 11 points and a mean of 100 points. if 140
Canine Gourmet Super Breath dog treats are sold in boxes labeled with a net weight of 12 ounces (340grams) per box. Each box contains eight individual 1.5 ounce packets. To reduce the chances of shorting the customer, product design specifications..
the guidance system for a rocket operates correctly with probability p when called upon. independently but identical
a zoo has offers to look over cost of a new lion den. the actual cost y at 200000 is predicted by the pdffx x for 0
a telephone survey commissioned by the new zealand health service found that 16 of new zealanders consume more than 10
assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of 2225
There is a fixed cost of $50,000 to start a production process. Once the process has begun, the variable cost per unit is $25. The revenue per unit is projected to be $45. Write a mathematical expression for total profit.
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