17
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Key Concepts
Linear Regression:
Estimation and Hypothesis
Testing
Linear regression equation
Regression eoetficieitt (Ii)
Regression constant lo I
Standard error of estimate
Hontoseechisiteit
Standard error ot the regression coetttcieni
Conditional

Normal Distribution
CGH301 Principles of Biostatistics
1
Normal Distribution
An underlying distribution based on the normal
curve.
The normal distribution is one of the most
commonly used underlying distributions in
inferential statistics.
The frequenc

8
Hypothesis Testing:
OneSample Case for
the Mean
Key Concepts
Hypothesis testing
Hypothesis
Null hypothesis
Alternative hypothesis
Type i error
Type II error
Level of significance (alpha level)
Region of rejection
Critical values
J
Totailed (nondirection

11
x
Key Concepts
Hypothesis Testing:
Two-Sample Case for
the Mean
Independent samples
Standard error of the difference
between means
Confidence interval for the difference
between means
Pooled estimate of the population variance
Assumption of homogeneity

CGH301 Lab
1
Z-test for Proportions
(Example 1)
A national study of homeless young people (ages
18 to 24) found that half (50%) are female. Is our
Los Angeles sample similar to the national study
in terms of gender at the .05 level of
significance?
Infor