Calculate the mean value of the differences:

dbar=(sum of differences)/n
Conducting a 2sample ttest for dependent samples:

State null and alternative

Identify alpha

Calculate degree of freedom

Find critical value

Calculate dbar and s
d

Calculate test score

Compare values and make determination

Interpre
t decision
9.1
Correlation

The relationship between two variables (x,y)

The x is the independent (explanatory) variable, the one that you
control

Y is the dependent (response) variable
Types of Correlation

Positive, as x increases, y increases

Negative, as x increases, y decreases

No correlation

Non Linear
Creating on Calculator

Put x data in L1 and y data in L2

To graph, 2nd > Y=

Select Plot 1

Make sure it is on

Make sure X list is in L1, and Y list is in L2

Select Zoom > #9
Correlation Coefficient

Measures the type and strength of linear correlation between the two
variables

Stat > Calc > 2Var Stats