Category: Uncategorized

Quick note:

When we add covariates to the model, we expect variance to reduce, but we can get negative R-squares from between-school variance.  This is because when we adjust for predictors the school averages/intercepts may change for both directions.  The between school variance may reduce or may enlarge as the meaning of school averages/intercept changes.  Can I simulate the case where between-school variance in fact enlarges??  Maybe this happens when pretest is very different by the two groups.

http://arc.uchicago.edu/reese/variance-almanac-academic-achievement

When I put subforms into the main form, I need to make sure that the main ID and the sub IDs are all correct.  I need to make this correct in three places.

• Highlight the form by clicking on it to activate the property sheet.  Find DATA, LINK CHILD FIELDS and specify the correct subID.
• Also remove the solidline.

f you select multiple buttons by pressing and hold Ctrl key, then right click, you should be able to change any common property of the buttons.

proc import out=work.test

datafile='C:\sastest\excelfile.xlsx'

dbms=xlsx replace;

sheet='Sheet1';

run;

proc export data=sashelp.class

outfile='C:\sastest\excelfile2.xlsx'

dbms=xlsx replace;

sheet='Sheet2';

run;

I have to say I spent about an hour trying to figure out how to use it off a PC. It worked immediately for my Samsung phone, but it refused to produce sound off my PC. After internet-searching for solutions, I made it work. Here is how:

a) Go to http://support.logitech.com/en_us/product/wireless-headset-h800and scroll down to "Headset Paring Utility" section
b) Click on download button for get a zipped file "paring_utility_1.00...zip".
c) Unzip it to your local folder (or just to the desktop).
d) Find Pairing.exe and click it to install.
e) Follow instructions that the software tells you. Basically on the headset's right-ear part, you have to find and press the volume up (+) button and the >> button (fast-forward button) at the same time until the green light on the headset begins to blink fast. When this happens, it is communicating with the PC and the Paring software. You have to follow a couple of more instructions on the software while this is happening. The >> button (fast forward button) on the headset may be hard to find, but it is on the left side of the green light.

DPLYR is some kind of module that allows efficient data management.

library(dplyr)

 

This keeps rows that has a specified value:

filter(dataname,School=="Ad High School")

x <- filter(dataname,School=="Ad High School")