Timothy A Ebert

9 Questions 991 Answers 0 Followers

Questions related from Timothy A Ebert

Is AIC (or variants) appropriate for comparing gamlss models?

I have a dataset with two variables: X and Y. X is a treatment, and Y is a response. I want to model Y = X using a general additive model where I then choose one distribution from about 8 choices....

21 November 2024 3,628 0 View

What are some ways of describing dispersion (not standard deviation, skew, kurtosis)?

I have the capacity to take samples on "n" days per year. I could take all the samples in the first "n" days, or I could spread them out in different ways over the interval. I am trying to think...

17 October 2022 2,690 5 View

How are EPA pesticide label PHI and REI values established?

I am looking for a document that details sampling protocols for gathering the data required to establish preharvest intervals and reentry intervals for Environmental Protection Agency pesticide...

09 February 2022 2,330 0 View

What is the value of F or chi-square in publication?

In reporting the results of a statistical test authors give degrees of freedom, an F statistic and a p-value. 1) As a reader, what am I to learn from the F statistic? 2) If I want to use a...

12 September 2019 9,603 4 View

What is the interpretation of different measures of kurtosis?

I have been working in R and Excel. I have the following data: 23, 24, 36, 44, 2431, 543, 43, 25, 64. In R the kurtosis is 6.51838 and in Excel the kurtosis is 7.84453 (both programs give more...

17 August 2018 5,148 2 View

If you reject the null hypothesis at alpha<0.05 would you be willing to accept it at alpha>0.95?

So you have run a two tailed t-test. You are hoping that the absolute value of the t-statistic has a probability of being observed less than 1 in 20 (0.05) if the null hypothesis is true. In this...

08 December 2015 5,768 16 View

Residuals Normal, independent Variables not so much: An Example?

The assumption in linear regression models is that the residuals are normally distributed, if everything is working properly. Is it possible to have residuals that are normally distributed when...

18 April 2015 829 14 View

Is it valid to do statistical analysis using data from monotonically increasing sequence?

I examine feeding behavior of an insect for several hours. One behavior is phloem ingestion. It has been postulated that the first instance of phloem ingestion is on average shorter than the...

12 November 2014 8,385 5 View

What is governmental efficiency?

The USA has gone so far as to have a new department of governmental efficiency. I cannot find a definition for governmental efficiency that would allow for a measurable determination of success....

01 January 1970 2,860 5 View