Run a SAS program for a Box-Cox transformation

Assignment Help Applied Statistics
Reference no: EM132265739

Assignment -

Consider the SAS file on n = 50 children from some hospital. This data set has been edited and is limited to:

  • The response variable (y) is "base". It is some clinical measurement on each child.
  • The main regressor variable is "age" of each child (in months).
  • The first data entry is "obs" which is the id of each child. Do not use obs in the regression model. It is simply in the data to help physicians identify each child.

Problem:

1. Run SAS with the option "influence" to obtain for each data value the diagnostics R-Student, hat diagonal, and the covariance ratio. Calculate for each of these three influence diagnostics the cut-off values. Check whether you should be removing any point(s) or not. Justify your decisions. If you remove any data value(s), you need to use only the remaining data in the next analyses.

2. Run a SAS program for a linear regression of base(y) on age of child (x). Do not transform the data here at all.

(a) Comment on the SAS output with respect to information on the slope and the intercept.

(b) Comment on the residual plots and any other information that could help you assess how well the assumptions for the regression are met.

(c) Which proportion of the total variability in base is accounted for by the linear regression of base on age?

(d) Test for Lack of Fit with SAS. What can you conclude regarding the model and LOF?

3. Test for normality of the response variable base. Comment on your findings. Make use of the Shapiro-Wilks Test in proc univariate and also use a QQ plot in SAS and associated correlation test. Do not transform the data here at all. What are your overall conclusions on the assumption of normality of the variable base?

4. Run a SAS program for a Box-Cox transformation of base to obtain a "power" that will create a transformed variable "base" that is approximately normal. Then check for normality of the transformed variable base with the Shapiro-Wilks Test in proc univariate and also use a QQ plot in SAS.

5. Using the transformed variable base (based on your results in 4) with the regressor variable age, test for Lack of Fit with SAS. What can you conclude regarding the model and LOF?

Attachment:- Assignment File.rar

Reference no: EM132265739

Questions Cloud

Define the concept of term structure of interest rates : Define the six factors that determine the nominal interest rate on a security. Define the concept of term structure of interest rates. What are three theories.
What defenses does employer have to charge of discrimination : What defenses does an employer have to a charge of discrimination?
What specific aspects of the organizational culture : You have been working there for a long time. What specific aspects of the organizational culture would you share with them?
Explain the concept of cash flow in corporate finance : Explain the concept of cash flow in corporate finance. Explain how present values are affected by changes in interest rates.
Run a SAS program for a Box-Cox transformation : STA6235 Assignment - Run a SAS program for a Box-Cox transformation of base to obtain a "power" that will create a transformed variable
Demonstrates exception handling routines : The program allows the user to reenter and input value that was invalid, until the user succeeds in entering a valid value.
Discuss the implications of activity-based costing system : Fully discuss the implications of the activity-based costing system with respect to:
Organizational behavior-organizational setting : Organizational Behavior: Group and a team in an organizational setting. Simply put, a group are a number of individual contributors who have their own interests
What costing method you would use for accounting records : What inventory costing method would you prefer, and why? Also, include a discussion as to whether the costing method you would use for your accounting records.

Reviews

len2265739

3/25/2019 2:53:20 AM

Instructions: Please share detailed, step-by-step solutions along with the report. No discussions are allowed with any person once the exam has been posted. It is allowed to access the Canvas site for STA6235 in addition to using the online SAS manual. Make it clear whether you are using the online sources or not. Show for each part of the exam the SAS program used (not including all data values. Show for each part the edited portions of each SAS output that best address each part in your opinion. Write up your report in the same order as the exam portions are listed below. What I am unable to find in your report will be graded as missing. Submit your completed report to CANVAS by the due date.

Write a Review

Applied Statistics Questions & Answers

  Hypothesis testing

What assumptions about the number of pedestrians passing the location in an hour are necessary for your hypothesis test to be valid?

  Calculate the maximum reduction in the standard deviation

Calculate the maximum reduction in the standard deviation

  Calculate the expected value, variance, and standard deviati

Calculate the expected value, variance, and standard deviation of the total income

  Determine the impact of social media use on student learning

Research paper examines determine the impact of social media use on student learning.

  Unemployment survey

Find a statistics study on Unemployment and explain the five-step process of the study.

  Statistical studies

Locate the original poll, summarize the poling procedure (background on how information was gathered), the sample surveyed.

  Evaluate the expected value of the total number of sales

Evaluate the expected value of the total number of sales

  Statistic project

Identify sample, population, sampling frame (if applicable), and response rate (if applicable). Describe sampling technique (if applicable) or experimental design

  Simple data analysis and comparison

Write a report on simple data analysis and comparison.

  Analyze the processed data in statistical survey

Analyze the processed data in Statistical survey.

  What is the probability

Find the probability of given case.

  Frequency distribution

Accepting Manipulation or Manipulating

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd