STA 2023
Practice Questions Exam 2
Chapter 7- sec 9.2
Formulas Given on the test:
Case
one
mean
one
prop.
parameter
estimator
p
standard error
x
p
p(1 p)
n
Estimate of
standard error
Sampling
Distribution
t (n-1)
s
n
n
p(1 p)
n
CI:
ST:
p 0 (1 p0 )
n
Memor
Review for Exam 2
Parameters vs Statistics
Probability vs Statistics
Chapter 7
Sampling Distributions
Proportions
Sampling distribution of p-hat:
X is Binomial (count of successes)
distribution of values a sample
statistic takes in repeated
sampling.
STA 2023
Practice Questions
Final Exam
STATISTICAL INFERENCE TABLE: (GIVEN on the test)
Case
parameter
one mean
estimator
standard error
x
Sampling
Distribution
t (n-1)
s
n
Mean of
matched pairs
difference
difference
of two
independent
means
d
xd
n
1 2
on
Review for Exam 3:
Confidence Intervals and Significance Tests for: one mean one proportion difference of two independent means difference of two independent proportions difference of two dependent means (matched pairs) Need to know: Identify which case C