# Unemployment rate

Over the last 16 years, the country's unemployment rate has changed according to the following frequency table:
years of unemployment: 2 5 2 3 3 1
unemployment rate: 0.5 1 1.5 2 2.5 3 in % (percent).

Determine the two-sided confidence interval for the variance DN with a confidence level of 0.95.

a =  1.224 %
b =  1.9635 %

### Step-by-step explanation:

$b=\mu +r=1.5938+0.3697=1.9635\mathrm{%}$

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