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(current)
Population Variances
Confidence Interval
$n$
=
s
s²
=
$\text{Confidence Level:}$
99
95
90
%
Solve
Example 1
•
Example 2
Hypothesis Testing
$H_o$:
σ²
σ₁²
≥
≤
=
σ₂²
$H_a$:
σ²
<
>
≠
σ₀²
$n$
=
s
s²
=
$\text{Level of Significance: }$
$\alpha$
=
.10
.05
.01
Solve
Example 1
•
Example 2