Test
2, Thursday, April 4,
Concepts to know:
Sampling Distribution of
the mean (mean, variance, and shape)
Central Limit Theorem
Unbiased estimator
Probability of Type(I)
error, alpha
Probability of Type (II)
error, beta
Power
Variables that influence
Power (alpha and sample size)
Relationship between
α and β
Statistical Significance
Statistical
Procedures Covered:
Confidence interval for the
population mean
when
n >30 using the z-table
when
n < 30 using the t-table, df=n-1
Confidence interval for the
population proportion, when np and nq are both greater than 5
Test of hypotheses for
a population mean:
One-sample
z test, n > 30
One-sample
t test, n < 30
Test of hypotheses for a
population proportion
When
np and nq are both greater than 5 use the z-table
Issues to keep in mind
while carrying out test of hypotheses
One-tailed vs two-tailed
tests
Assumptions for the
tests
Null vs. Alternative
hypotheses
Rejection Region (to
reject or retain the Null)
Chapters covered:
5.5-5.6, 6.1-6.5, 7.1-7.5
You may bring a 4"
by 6" card with any information that you want on it.
Also you may make bring extra paper, a calculator and the normal and t
tables.