1
Q
p1(2)
A
Population proportion
2
Q
n1 (2)
A
size of sample
3
Q
x1 (2)
A
sucess in sample
4
Q
p̂1 (2)=
A
x1/n1
5
Q
q̂1 (2)=
A
1-p̂1
6
Q
p̅=
A
x1+x2/n1+n2
7
Q
q(bar)
A
1-p̅
8
Q
Z for proportions
A
z=(p̂1-p̂2)-(p1-p2)/✓p̅q(bar)/n1+p̅q(bar)/n2
9
Q
E for p
A
E=zα/2✓p̂1q̂1/n1+p̂2q̂2/n2
10
Q
CI for p
A
(p̂1-p̂2)-E<(p̂1-p̂2)+E
11
Q
Independent samples
A
Sample from one population is not related to another. Use t chart.
12
Q
Dependent samples
A
Sample values are paired (before/after, wife/husband) Use (A2).
13
Q
μ1 (2)
A
population mean
14
Q
σ1 (2)
A
population standard deviation
15
Q
n1 (2)
A
sample size
16
Q
x̄1 (2)
A
sample mean
17
Q
s1 (2)
A
sample standard deviation
18
Q
df for 2 samples
A
Smallest of (n1-1) and (n2-1)
19
Q
E for μ
A
E=tα/2✓s1^2/n1+s2^2/n2
20
Q
CI for μ
A
(x̄1-x̄2)-E<(x̄1-x̄2)+E
21
Q
t=
A
(x̄1-x̄2)-(μ1-μ2)/✓s1^2/n1+s2^2/n2
Statistics
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