Analysis of Variance (ANOVA)
Introduction
When hypothesis testing is performed in clinical research, the data embedded into each sample
corresponds to a specific sample. If there are one or two treatments, then use t-tests to analyze
the effectiveness of

.ANOVA
Analysis of Variance is a method of testing the equality of three or more population
means by analyzing sample variance.
One-Way ANOVA
The one-way ANOVA is used to compare three or more population means when there is
one factor of interest.
Require

T-test
A t-test is a hypothesis test in which the test statistic follows a Students t-distribution under the
null hypothesis. There are several different test statistics that fall into the category of a t-test.
One-Sample t-test
x 0
s
n
df n 1
t
Independe

Exercise 23.
1. What is the r value for the relationship between Hamstring strength index 60/s and the
shuttle run test? Is this r significant? Provide a rationale for your answer.
r = -0.149 is the r Value listed in Table 5 for the relationship between H

Topic Five: Correlation/Regression and Chi Square
Excel Worksheet
Directions: Answer all problems and submit to instructor at the end of Module 5
SYSTOLIC AND DIASTOLIC BLOOD PRESSURE OF FEMALES
The following table represents systolic and diastolic blood

Hypothesis Testing
Answer each question completely to recieve full credit
1. There is a new drug that is used to treat leukemia. The following data
represents the remission time in weeks for a random sample of 21
patients using the drug.
10
11
10
7
20
34

Exercise 16.
1. The researchers analyzed the data they collected as though it was at what level of
measurement?
C. Interval/ratio
2. What was the mean posttest empowerment score for the control group?
97.12
3. Compare the mean baseline and posttest depres

Topic 4: ANOVA Excel Worksheet
Directions: Answer all questions and submit to instructor at the end
of Module 4
Statistical Conclusion:
Since Fobs is less than Fcrit (Fobs = 1.655 < 3.252 = Fcrit) we fail to reject the null hypothesis that all treatment
m