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INTERPRETTING LEVENE'S TEST (STATA) I looked this up quite a bit, and found alot about it, but I'm still not entirely sure if I got it right. I just recently got an assignment back with some needed corrections; this one is about Levene's test and t-test. My lecturer wants me to do a Levene's test (robvar in Stata),and I get these
DIFFERENCES BETWEEN 2 X1 AND X1 + X2 UNDER NORMAL The question is as below: 1. If X1 ~ N(μ, σ2) and X2 ~ N(μ, σ2) are normal random variables, then what is the difference between 2 X1 and X1 + X2?Discuss both their distributions and parameters. I try the following solution however I am unable to identify any differences. NORMAL DISTRIBUTION TIMES CONSTANT New Member. Sep 30, 2012. #1. Sep 30, 2012. #1. I can't seem to find anything about this on the web. If I have a random variable distributed Normally: x ~ Normal (mean,variance) is the distribution of the random variable still normal if I multiply it by a constant, and if so, how does it affect the mean and variance? EFFECT SIZE & PERCENTAGES? danony. New Member. Aug 20, 2011. #3. Aug 20, 2011. #3. You could translate the effect size into what it means practically in relation to your field. So if you're measuring climate, you could say an effect size of .51 equates to 2 degrees for example. An effect size in z-score standard deviation units for example requires a fair bit of1st year
CLASSIFYING SCALE TYPES The following exercise is in my statistics book, but do not have the answers. Seeking help to confirm and/or correct my answers about scales. Very confusing! Classify the following: nominal, ordinal, interval, ratio 1. Your checking account number as a name for youraccount. Nominal
REPORTING OF FISHER'S EXACT TEST?? I used a Fisher's exact test to look at one of my 2x2 tables with low cell counts. I have no idea how to report that in my paper. Forexample, when I
HYPOTHESIS TESTING ON PROPORTION Hi, I am doing this assignment qn. My answer is not the same as the answer in textbook. I try to figure for some time, but I still can't get the answer in my book. Qn: A marketing expert for a pasta-making company believes that 40% of pasta lovers prefer lasagna. If 9 out of20 pasta lovers
ANOVA 2 FACTOR WITH REP In the example which I attached, Group 1 has a total of 16 observations in 11 rows and Group has a total of 23 observations in 12 rows. If I tell Excel that there are 11 rows in each sample it works (but leaves out the 12th row in the second group). STATA ABSOLUTE VALUES i want to deduct a variable from another variable but the result should be in absolute value. i cant find the command for that STATISTICS HELP @ TALK STATS FORUMSTATISTICSSKEWNESS AND KURTOSIS OF A T-DISTRIBUTIONCAN I CORRELATE MULTIPLE VARIABLES AS A WHOLE Free statistics help forum. Discuss statistical research, data analysis, statistics homework questions, R, SAS, Stata, SPSS, andmore.
INTERPRETTING LEVENE'S TEST (STATA) I looked this up quite a bit, and found alot about it, but I'm still not entirely sure if I got it right. I just recently got an assignment back with some needed corrections; this one is about Levene's test and t-test. My lecturer wants me to do a Levene's test (robvar in Stata),and I get these
DIFFERENCES BETWEEN 2 X1 AND X1 + X2 UNDER NORMAL The question is as below: 1. If X1 ~ N(μ, σ2) and X2 ~ N(μ, σ2) are normal random variables, then what is the difference between 2 X1 and X1 + X2?Discuss both their distributions and parameters. I try the following solution however I am unable to identify any differences. NORMAL DISTRIBUTION TIMES CONSTANT New Member. Sep 30, 2012. #1. Sep 30, 2012. #1. I can't seem to find anything about this on the web. If I have a random variable distributed Normally: x ~ Normal (mean,variance) is the distribution of the random variable still normal if I multiply it by a constant, and if so, how does it affect the mean and variance? EFFECT SIZE & PERCENTAGES? danony. New Member. Aug 20, 2011. #3. Aug 20, 2011. #3. You could translate the effect size into what it means practically in relation to your field. So if you're measuring climate, you could say an effect size of .51 equates to 2 degrees for example. An effect size in z-score standard deviation units for example requires a fair bit of1st year
CLASSIFYING SCALE TYPES The following exercise is in my statistics book, but do not have the answers. Seeking help to confirm and/or correct my answers about scales. Very confusing! Classify the following: nominal, ordinal, interval, ratio 1. Your checking account number as a name for youraccount. Nominal
REPORTING OF FISHER'S EXACT TEST?? I used a Fisher's exact test to look at one of my 2x2 tables with low cell counts. I have no idea how to report that in my paper. Forexample, when I
HYPOTHESIS TESTING ON PROPORTION Hi, I am doing this assignment qn. My answer is not the same as the answer in textbook. I try to figure for some time, but I still can't get the answer in my book. Qn: A marketing expert for a pasta-making company believes that 40% of pasta lovers prefer lasagna. If 9 out of20 pasta lovers
ANOVA 2 FACTOR WITH REP In the example which I attached, Group 1 has a total of 16 observations in 11 rows and Group has a total of 23 observations in 12 rows. If I tell Excel that there are 11 rows in each sample it works (but leaves out the 12th row in the second group). STATA ABSOLUTE VALUES i want to deduct a variable from another variable but the result should be in absolute value. i cant find the command for that STATISTICS HELP @ TALK STATS FORUM Free statistics help forum. Discuss statistical research, data analysis, statistics homework questions, R, SAS, Stata, SPSS, andmore.
CLASSIFYING SCALE TYPES The following exercise is in my statistics book, but do not have the answers. Seeking help to confirm and/or correct my answers about scales. Very confusing! Classify the following: nominal, ordinal, interval, ratio 1. Your checking account number as a name for youraccount. Nominal
IFELSE QUESTION, RETURN ORIGINAL VALUE FROM DATA FRAME Jun 23, 2011. #1. Hi all, I am trying to replace values in a data frame using the 'ifelse' function and I am having some trouble. I want to set up a statement so that if the test is false it returns whatever value was there originally. For example if I have data frame 'X' with values: 1/1, 1/1, 2/2, 3/3. I want to replace all "1/1" with "4/4 STATA ABSOLUTE VALUES i want to deduct a variable from another variable but the result should be in absolute value. i cant find the command for that HELP NEEDED WITH DATA COMPUTE ISSUE TS Contributor. Mar 24, 2014. #6. Mar 24, 2014. #6. In addition to Berley's statement: if you haven't already done this, then you should have a look at that variable values, i.e. use "split file". and split by gender, then run the "frequencies" command and look. whether there's something strange about your data distribution. PROBLEM WITH DECISION TREE USING RPART: "FIT IS NOT A TREE I'm doing very basic decision tree practice, but I"m having trouble getting my tree to output. I'm using the rpart function for this. It's an analysis on 'large' auto accident losses (indicated by a 1 or 0) and using several characteristics of the insurance policy; i,e vehicleyear, age
LIKELIHOOD RATIO IN COX REGRESSION ANALYSIS? The Likelihood ratio test (LRT) is an approximate test based on χ2 k χ k 2 on k degrees of freedom. The approximation gets better as sample size increases. The likelihood ratio test is based on the twice the difference in the maximized log-likelihood between the nested andthe larger models.
ERROR IN SPSS OUTPUT Hi bobrose, one of your groups has 1 observation only. You have to remove this group (or line). When you ask for anova, ask for the descriptive statistics also. BREUSCH PAGEN TEST ?! URGENT, HOW TO REPORT APA STYLE You would then add what specific in the Breush Pagan test supported this. An example of the wording is "High school GPA statistically predicted college mathematics performance, R squared =.12, F (1,48)=20.18 PDetails
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