by Dawn Wright | Jan 4, 2019

Every time I teach the Central Limit Theorem, I get questions from students on why we divide the population standard deviation, sigma, by the square root of the sample size to calculate the standard deviation of the sampling distribution which we call the standard...
by Dawn Wright | Dec 29, 2018

Back in the dark ages when access to computers was not all that common, I was faced with developing a project schedule for, to me, a complex construction project. I was not that long out of school, so I sought out my boss with the hope he would give me some guidance...
by Dawn Wright | Dec 5, 2018

A Two-sample problem for testing to see if the two proportions are different:
by Dawn Wright | Nov 25, 2018

Joel, I have not checked all your calculations, but the process you used looks good. I note that this is a problem where you are given a lot of raw data. Which technology did you use? I ask because problems where you have to manually enter a lot of raw data often lead...
by Dawn Wright | Nov 21, 2018

Homepage About Excel Calculators BUS 233/503 Video Matrix The Easier Way After you have completed the statistical analysis and decided to reject or fail to reject the Null hypothesis, you need to state your conclusion about the claim. To get the correct wording, you...