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### example of variability problems

Course: STA 6166, Summer 2008
School: University of Florida
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University of Florida - STA - 6166
#Distribution of Xbar and S2 numsims &lt;- 10000 Stats &lt;- matrix(0,nrow=numsims, ncol=3) for (i in 1:numsims) { sampleset &lt;- rnorm(10, mean = 5, sd = 10) #variance = 100 Stats[i,1] &lt;- mean(sampleset) Stats[i,2] &lt;- var(sampleset) } Stats[,3] &lt;- Stats[,2]
University of Florida - STA - 6166
Wisconsin - TC - 070729
University of Florida - STA - 6166
Homework # 1 STA 6166 Fall 2005 (Sections 8489 and 8490) Due 30 August 2005 at start of classPlease read the descriptions on the next page. Please answer questions about the first experiment involving changing answers on exams. Answer the following
University of Florida - STA - 6166
HomeWork #2 for STA 6166 Sections 8489 and 8490 Due 27 September 2005 at the start of class A. An experiment was carried out in which 400 individuals were sampled and two variables were measured on each individual: a &quot;treatment&quot; (e.g. marital status)
University of Florida - STA - 6166
HW # 3 STA 6166 Fall 2005 DUE: 11 October 2005 at start of class There are several problems listed in this HW. Please do the first 2 problems (gasoline and cattle) as your assignment. The rest are practice problems to be tried and whose answers will
University of Florida - STA - 6166
University of Florida - STA - 6166
Home Work # 5Due 15 November 2005STA6166
Wisconsin - TC - 070729
University of Florida - STA - 6166
Exam I, Biometrics 601, Fall 2003 Name: Solution Key Lab Section:Please copy and sign the honor pledge in the following box:Instructions: Please write your answers CLEARLY in the space provided. Be succinct but complete. Total time for the test i
University of Florida - STA - 6166
Quiz #1 STA 6166Data were collected on the size of deer herds for 50 randomly selected herds in the Southeast US. Here are results from a preliminary exploratory analysis. Please describe for someone who does NOT have access to these results, the d
Wisconsin - TC - 070729
University of Florida - STA - 6166
Exam II, Biometrics 601, Fall 2003 Name: Solution Key Lab Section:Please copy and sign the honor pledge in the following box:Instructions: Please write your answers CLEARLY in the space provided. Be succinct but complete. Total time for the test
University of Florida - STA - 6166
QUIZ 1, STA6166, 6 September 2005 For each entry in the following list, identify the type of variable as Categorical, Discrete, or Continuous. 1. Number of bacterial colonies on an agar plate - Discrete 2. Forage grass biomass per square meter - Cont
University of Florida - STA - 6166
Biometrics 301 NAME: (total # points = 55)Fall 2000 SSN: Section:Exam IIQuestion 1 (4 points) An avian community that utilizes a pear orchard in West Virginia consists of the following species in the amounts indicated: 15% 5% 7% 6% 10% 57% Answ
Wisconsin - TC - 070729
%!PS-Adobe-2.0 %Creator: MATLAB, The Mathworks, Inc. Version 7.4.0.287 (R2007a). Operating System: Darwin 8.10.1 Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 i386. %Title: ./070729_13.ps %CreationDate:
University of Florida - STA - 6166
QUIZ STA 6166 Fall 2005 NAME: _ SECTION (circle one): 8489 (morning) 8490 (lunchtime)Suppose we have two populations. Population A has a mean of 100 and a standard deviation of 10. Population B has a mean of 2000 and a standard deviation of 300. a
Wisconsin - TC - 070729
University of Florida - STA - 6166
Practice Questions for Exam I And Homework #3 Assignment for HW # 3: due Tuesday, 30 September, at the start of the lecture. Please submit answers for questions 13 through 17. The answers to all questions will be made available after the lecture on t
Wisconsin - TC - 070729
%!PS-Adobe-2.0 %Creator: MATLAB, The Mathworks, Inc. Version 7.4.0.287 (R2007a). Operating System: Darwin 8.10.1 Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 i386. %Title: ./070729_14.ps %CreationDate:
University of Florida - STA - 6166
QUIZ 3 STA 6166 Fall 20051) Suppose we have two populations. Population A has a mean of 100 and a standard deviation of 10. Population B has a mean of 2000 and a standard deviation of 100. Which population is more variable in distribution? Why? CV
Wisconsin - TC - 070729
University of Florida - STA - 6166
Exam III, Biometrics 601, Fall 2003 Name: Solution Lab Section:Please copy and sign the honor pledge in the following box:Instructions: Please write your answers CLEARLY in the space provided. Be succinct but complete. Total time for the test is
Wisconsin - TC - 070729
%!PS-Adobe-2.0 %Creator: MATLAB, The Mathworks, Inc. Version 7.4.0.287 (R2007a). Operating System: Darwin 8.10.1 Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 i386. %Title: ./070729_15.ps %CreationDate:
University of Florida - STA - 6166
QUIZ 4STA 616627 September 2005DDT was used extensively in the 1950s and 1960s and banned in 1972. Along with all the other deleterious effects DDT caused in the environment, it also was found to cause thinning of the eggshells of predaceous bi
Wisconsin - TC - 070729
University of Florida - STA - 6166
1 Final Exam Biometrics 301, Fall 2001Instructions: You are permitted your textbook, a ruler, a calculator, and pens and pencils. You may not share anything with your neighbors. The test is 2 hours long. Read each question carefully before answerin
Idaho - ECE - 527
EE527Dynamics and Control of AC Drives Homework Set #4Due: 10 October 2007 on campus Due: 24 October 2007 off campus1. (10 points) Consider the overmodulation case of sine-triangle PWM, where the amplitude of the sine wave exceeds the amplitude o
University of Florida - STA - 6166
Quiz 4STA 6166Fall 2005Suppose we have a population of decomposition rates (Y) for leaf litter in streams. The population is normally distributed with a mean of 7 (% drop in initial mass/month) and a standard deviation of 2. 1. What proportion
Wisconsin - TC - 070729
%!PS-Adobe-2.0 %Creator: MATLAB, The Mathworks, Inc. Version 7.4.0.287 (R2007a). Operating System: Darwin 8.10.1 Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 i386. %Title: ./070729_16.ps %CreationDate:
University of Florida - STA - 6166
1Answer Sheet for Final Exam Biometrics 301, Fall 2001 NAME: Solutions (total points = 115 ) SSN: DISCUSSION SECTION: _Question 1. a. 4 pts The sample of birds that died is approximately symmetric except for 2 outliers at the lower end of arm leng
University of Florida - STA - 6166
1 Final Exam Biometrics 301, Fall 2000NAME: SOLUTIONS SSN: DISCUSSION SECTION: _Pollution of waterways is one of the most serious problems facing the world today. Pollutant levels in various bodies of water are important to study in order to unde
Wisconsin - TC - 070729
University of Florida - STA - 6166
HomeWork #2 for STA 6166 Sections 8489 and 8490 Due 27 September 2005 at the start of class A. An experiment was carried out in which 400 individuals were sampled and two variables were measured on each individual: a &quot;treatment&quot; (e.g. marital status)
University of Florida - STA - 6166
HW # 3 STA 6166 Fall 2005 DUE: 11 October 2005 at start of class There are several problems listed in this HW. Please do the first 2 problems (gasoline and cattle) as your assignment. The rest are practice problems to be tried and whose answers will
University of Florida - STA - 6166
Homework #4 Practice ProblemsSTA6166Fall 2005 s a. We'll use the equation x t 14,0.99 where the t-critical value is 2.9768. Using n JMP we get the following:Distribution - Mileage Moments Mean Std Dev Std Err Mean upper 95% Mean lower 9
Wisconsin - TC - 070729
University of Florida - STA - 6166
Home Work # 5 SolutionsDue 15 November 2005STA61662.19 a. Lack of randomization leads to biased results, i.e. the treatment means will not be representative of the true treatment means. In addition, the testing procedure that is commonly used w
University of Florida - STA - 6166
Quiz 7 SolutionsSTA 6166Fall 2005Of interest is whether the mean plasma polyamine differs between two age groups. To test the hypothesis, five newborns and five children age 1 yo were randomly selected for measurement. The results are shown bel
University of Florida - STA - 6166
Quiz #8STA6166Fall 2005Fifty men with high serum cholesterol, all regular coffee drinkers, participated in a study to see whether abstaining from coffee would affect their cholesterol levels. 25 men were randomly allocated to abstain from coffe
UNC Wilmington - HANDOUTS - 221
Econ 221 Ch. 5 Appendix Indifference Curves This is not Due for a Grade The main point of this appendix is to represent the utility maximizing rule (the equimarginal principle) in a graphical context. Again, our focus will be on answering the questi
UNC Wilmington - HANDOUTS - 221
Econ 221 ~ Answers to the Practice problems for Chapter 5 appendix 1. Draw an indifference curve for the consumption of two goods (you make up the goods).#jelly doughnutsU1#glazed doughnutsa. (3) What does this indifference curve represent? I
Wisconsin - TC - 070729
Aircraft Roll Angle sh070729 20 Roll (degrees) 10 0 -10 -20 11.5539 12.8546 14.1553 15.456 16.7566 18.0573Aircraft Pitch Angle 15 Aircraft Pitch (degrees) 10 5 0 -5 -10 -15 11.5539 12.8546 14.1553 15.456 16.7566 18.0573Ground Speed 250 200 Speed
University of Florida - STA - 6166
HOMEWORK #1
University of Florida - STA - 6166
HOMEWORK #1
University of Florida - STA - 6166
HOMEWORK #2
Wisconsin - TC - 070729
%!PS-Adobe-3.0 %Creator: MATLAB, The Mathworks, Inc. Version 7.4.0.287 (R2007a). Operating System: Darwin 8.10.1 Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 i386. %Title: ./sh070729_tilt01.ps %Creation
University of Florida - STA - 6166
HOMEWORK #2
University of Florida - STA - 6166
University of Florida - STA - 6166
University of Florida - STA - 6166
Wisconsin - TC - 070729
%!PS-Adobe-3.0 %Creator: MATLAB, The Mathworks, Inc. Version 7.4.0.287 (R2007a). Operating System: Darwin 8.10.1 Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 i386. %Title: ./sh070729_tilt02.ps %Creation
University of Florida - STA - 6166
University of Florida - STA - 6166
University of Florida - STA - 6166
University of Florida - STA - 6166
University of Florida - STA - 6166
University of Florida - STA - 6166
Wisconsin - TC - 070729
Tilt Power (binned by frequency) vs Time sh070729 2000 1000 sum( 2 - 50 Hz) sum( 51 - 99 Hz) sum( 100 - 148 Hz) sum( 149 - 197 Hz) sum( 198 - 246 Hz)100 50 11.587812.869414.15115.432716.714317.996250 200 Speed (m/s) 150 100 50 0 11.5878
University of Florida - STA - 6166
Wisconsin - TC - 070729
%!PS-Adobe-3.0 %Creator: MATLAB, The Mathworks, Inc. Version 7.4.0.287 (R2007a). Operating System: Darwin 8.10.1 Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 i386. %Title: ./sh070729_tilt04.ps %Creation