Developing a 95% confidence interval

[MrsM]

Hello,

what codes should I use for this?

Develop a 95% confidence interval for the difference in the average cholesterol level 2 days after the heart attack compared to the control group.

Some of the variables in the data set are :  twoday and control.... 

[PaigeMiller]

Here's an example:

https://documentation.sas.com/?cdcId=pgmsascdc&cdcVersion=9.4_3.4&docsetId=statug&docsetTarget=statu...

For this to work, you will have to re-arrange your data so that instead of a column for twoday and another column for control, both cholesterol readings are in the same column, and an ID column exists indicating TWODAY or CONTROL.