Explanatory variables in the regression

Reference no: EM131009230

The ANOVA in this chapter compares the yield of 5 varieties of wheat. In fact, the Colorado trials in- volved 54 varieties! Suppose our grower in eastern Colorado was interested in comparisons among all 54 varieties, not just 5. (Assume 8 plots for each variety, so n = 8 * 54 = 432.)

(a) How many dummy variables would be needed as explanatory variables in the regression?

(b) Suppose that se = 4.217 bushels per acre, as in the text analysis of five varieties. With so much more data, are the Tukey and Bonferroni con- fidence intervals for the differences in average yields longer or shorter than those in the analysis of five varieties?

Reference no: EM131009230

Questions Cloud

Producing a numerical score called gullible : As part of the study underlying Example 1, each customer took a test that measures willingness to believe claims, producing a numerical score called Gullible. If the customers had not been randomly assigned, an analyst planned to fit the regressio..

Problem regarding the different amounts of fertilizer : Suppose that different amounts of fertilizer had been used in different fields that were involved in the wheat trials. (a) Explain how the use of different amounts of fertilizer confounds the experimental analysis in the absence of randomization.

Accuracy of the estimated mean of the first group : The 95% confidence interval for m derived from a sample of n observations from a normal population gets smaller as the sample size increases because the standard error of the mean s> 1n decreases. Adding more groups to an ANOVA also increases n. (..

Find the length of the curve : Find the length of the curve x=((y3)/3)+(1/(4y)) from y=1 to y=4. Find the length of the curve at x=((y3)/6)+(1/(2y)) on 3 less than or equal to y less than or equal to 5.

Explanatory variables in the regression : How many dummy variables would be needed as explanatory variables in the regression? Suppose that se = 4.217 bushels per acre, as in the text analysis of five varieties. With so much more data, are the Tukey and Bonferroni confidence intervals for ..

What types of strategies they using to reach target market : What types of strategies are they using to reach this target market, and what strategies can you recommend in the future? In the interest of maintaining diversity within the discussion forum, please select a company that has not yet been discussed b..

Explanatory variables to predict costs : A modeler has constructed a multiple regression with k = 10 explanatory variables to predict costs to her firm of providing health care to its employees. To de- cide which of the 10 explanatory variables is statistically significant, she rejects H..

Find the distance of the given point from the given line : Find the distance of the point (1,2,3) from the line x=y=z. Find the distance between the lines x-1=2y=z and x=-t+3y, y=3t, z=5.

Write a program to generate a patient bill : Write programs in Visual Basic while being guided by the six steps of the program development cycle: analyze the problem, design a solution, choose the interface, write code, test and debug your solution, and document code.

User Account

All Pages