Statistic Assignment 4
Part A
Using an example (be creative) define and explain degrees of freedom.
The formula for calculating degrees of freedom for this assignment is N – 1.
If N = 10 and the mean of your sample = 77.1, solve for the score X below.
52, 5, 97, 175, 40, 104, 130, 39, 117, X
X = ? .
Part B
Compare and contrast directional and non-directional hypotheses. Provide an example of a directional and of a non-directional hypothesis.
Part C
What is the difference between probability and non probability sampling?
Provide an example of probability and an example of non-probability sampling.
What is the best type of sampling procedure a researcher can use to generalize from a sample to a population? Why?
