The number of degrees of freedom associated with the t-test, when the data are gathered from a matched pairs experiment with 10 pairs, is:

A) 10
B) 20
C) 9
D) 18
E) 11

Degrees Of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, crucial for estimating population parameters.

Matched Pairs Experiment

An experimental design where subjects are paired based on certain characteristics, and then one in each pair is randomly assigned to the treatment group, while the other receives the control.

T-Test

A statistical test used to determine if there is a significant difference between the means of two groups, which may be related in certain features.