This preview shows pages 1–2. Sign up to view the full content.
Data Notes Section 3
EX:1
I think grades on an actual exam are higher compared to the bonus exam b/c the
risk associated with a bonus exam is lower. I want to prove abovestated guess using data.
One Sample Problem? No
Variable Nominal? No, because grades are interval
Are they Related? Yes, because they are both all students are doing same tests.
Ho: µ≥0
and
Ha:µ<o
Follow decision tree and find out to run ttest because samples are related then look at test
statistic and see if the test statistic is consistent with the null. If not consistent then you fail to
reject the null. If pvalue in this case is less than alpha reject null.
Ftest
= a procedure that we use to determine whether variance 1 equals variance 2. Ftest is a
hypothesis testing procedure and there are two constant hypothesis. Find out which applies and
continue to correct ttest.
Ho: variance 1 = variance 2
Ha: variances are not equal(≠)
When running Ftest always double pvalue.
DO NOT ASSUME EXPERIMENT IS RANDOM IT WILL SAY
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 08/08/2011 for the course WCOB 1033 taught by Professor Jensen during the Fall '05 term at Arkansas.
 Fall '05
 Jensen

Click to edit the document details