variation

Hello, I am stuck on what seems to be a very simple question. I recorded the duration of 20 bird songs and I want to know whether the average duration is significantly shorter or longer for bird(s). Is there any way to test for normality? BIRD_ID DURATION A01 0.03 A02...

Let f(x)= x2−3, for x<3, x2+3, for x≥3 I need to determine the total variation and the quadratic variation of f(x) on the interval [−4, 4]. For the total variation, I guess I can use my raw way to do it. It means see that f(−4)=13, f(0)=−3, f(2.999999)=5.99999, f(3)=12, f(4)=19. So...

I'm working on a project where I have about 300 geographic units and each unit has 11-5000 people. There are five guidelines and each person can be compliant or non-compliant for each guideline. I have calculated a percent compliance for each guideline for each geographic unit. For example...

Good morning, I want to run a pricing experiment to see the change in the number of purchases (i.e.demand) in response to a 10% increase in price in a specific market for my product. I selected 2 markets with very similar characteristics, where one will get a treatment effect and the other...

I'm struggling to find the appropriate solution to a project that I'm working on. I am trying measure the variability of lead time on products that we purchase I can't figure out what an appropriate calculation would be. Below are some of the details. - I'm trying to compare vendors. Some...

I am helping conduct a review of scholarship applications. There were approximately 275 applicants that were reviewed by various individuals. There seems to be a lot of variation in scoring among the reviewers. Issue being not everyone reviewed each individual, so those who have high...

I'm not sure what the total variation, explained variation and the unexplained variation mean. Given a group of data (x,y) how would I calculate? Also, what are the coefficient of determination and the standard error of the estimate? How are they calculated? Please explain. This part is...