CTE 363
Evaluation in
Career and Technical
Lesson Nine
STATISTICAL
EVALUATION OF TESTS
(PART I)
Knowledge of
basic statistics is useful for analyzing and improving tests. Statistics allow
us to apply quantitative precision to the evaluation process. Evaluation
efforts need this precision since the results of teacher’s evaluation is used
to inform students, parents, school personnel and, in some cases, employers
about the skills and competencies of students.
During the
next two lessons, you will learn to apply simple statistical
techniques to the evaluation process. These techniques are very helpful in
assessing test results and improving instruction.
Lesson Outline:
o
Rank Order -- Ascending /
Descending
o
Range
o
Frequency Distribution
o
Frequency Table -- Histogram
o
Measures of Central Tendency
o
Mean
o
Median
o
Mode
o Range
o Standard Deviation
o Normal Distribution
o
Normal Curve
o
Positive Skewed
o
Negative Skewed
·
Interpretation of Test
Scores
o Percentiles
o Deciles
o Quartiles
o Standard Scores
o Z-scores
o T-scores
o
Measures of relationships
o
Correlation Coefficient
o
Standard Error
1. Review and
be able to discuss each section of the Information
2. Be able to
accurately complete the "Evaluation Project" for the
class.
3. Be able to
describe briefly the "Evaluation Presentation" which
you have
planned for the class.
References:
1. Information Sheet –
"Statistical Analysis of Tests"