Structural Equation Model using same dataset used for the Rasch analysis. The results were not as I expected - none of the predictor variables predicted income.

This model shows both the CFA and the SEM models ran for Liberia and Monrovia. Statistical significance shown in the 2 SEM models. Note the coding of health ~~ educ in the models. This is Dr. Nolla's fix. Also note the comment that 4 of the regions did not work. The 5th one ran, but not well.

The data still prevent the code from running properly, but this works better than using urban/rural.

Cannot run group = "urb_rural". Filtered final_df into 2 groups. Run the code on each group. This is the urban run.

Tried group = wi_categorical. See comments about variables having no variance. The filtered urban out and ran on rural only. It sort of worked. See error messages.

Attempt to predict wealth index w/ SEM. I don't think it worked, but the model ran. It would not run if I used group = "urb_rural".

Added std.lv and ordered for dichotomous variables. SEM model bombed. Couldn't calculate z values and p values. High correlations among some variables. Will remove and try again.

Done for PSYM 790

Tried using equate. Results not good. Need better code.

Modified code from 9 Oct Class to use my own data. The data files I generated I kept on my HD and read them into R.

KABC1 from Chapter 14 in Kline

Dr. Amissah's code for equating

test of q170a to see if the distribution of responses is as expected.

Found line of code that puts theta in the .csv file

Use Kaggle Retail Salesperson Data for comparison w/ Winsteps

Had to remove the 4 person ID columns - position, age, gender, marital_status. The GoF command did not run. Error in mvrnorm(1, betas, Var.betas) : 'Sigma' is not positive definite. I did this w/ code from https://www.youtube.com/watch?v=C-ulJ6u9EWo Dr. Ngo Cong-Lem

Text Chapter 9

Exploring R before class assignments

Fooling w/ Plots 10 Sept 2022

See code for filter and subset.

This has code for extracting columns from a larger dataset and pasting the extracted columns in a new dataset. Also note the use of row.names = FALSE. Old code showing simple extraction of columns also in this .Rmd file.

Has matrix questions as well.

I did this one in html; same result; had to comment out many lines of code, and when I did, I lost tables and bar charts.

Based on 1st 2 homework assignments in Math 215

Draft 1

I did it!!!

This one w/ help from Professor Saidi

The 1st time I did the Sunday exercise I did it in the console. There is no knit command in the console (that I know of). So I ran it again in the editor. I knitted both so you can see both.

First working code in R