Problem 1. In the region studied the dependence of expenditure on food (y - thous.) Income from (x - thousand rubles.) For 10 groups of families:
Problem 2. For the regression equation analysis of variance results were as follows:

Problem 3. We consider macroeconomic model:

.

where

- GRP (bln.)
- Investment in fixed assets (bln.)
- Gross profit of economy (billion rubles).
- The number of employed in the economy (million people.)
- The growth rate of industrial production (%)
- Investment in fixed assets last year (bln.).
Task 4. Dynamics of the number of officially registered unemployed in the region is characterized by the following data:
Task 5. The dependence of sales of TVs (- thousand units) of per capita income per month (- rub.) On the following data: