# Statistician 7500

A statistician monitored the variance of monthly wages and found its value to be 640,000. Determine the standard deviation of salaries if there is a one-off increase:

a) about CZK 1,800,

b) about 5%.

a) about CZK 1,800,

b) about 5%.

### Correct answer:

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#### You need to know the following knowledge to solve this word math problem:

**statistics**- standard deviation
- variance
**algebra**- expression of a variable from the formula
**arithmetic**- square root
- square (second power, quadratic)
**basic functions**- percentages
- reason

#### Units of physical quantities:

#### Grade of the word problem:

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