# 4 задачи по статистике

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Problem 1. Trading company planned in 2007 compared to 2006 increased turnover by 14.5%. Implementation of the plan was set to 102.7%. Determine the relative measure of the dynamics of the turnover.

Problem 2. The distribution of firms by size retail monthly turnover
commodity turnover
Million. 5 5-10 10-15 15-20 20-25 Over 25 total
the number of firms 10 16 10 24 20 20 100
Define:
a) the average monthly turnover per firm;
b) the modal and median monthly turnover;
c) A dispersion and standard deviation.

Problem 3. The mean square deviation of variants of an arbitrary value of 300 is equal to, and she is an arbitrary value of 70 units. The variance of feature, if you know that the average value of a variant is 80.

Objective 4. Distribution of proceeds from the sale of permits in the directions for the three companies is characterized by the following data:
The company's total revenue, including international tourism
1
2
3160
220
420120
180
280
Total 800 580
Determine: a) the share of intra-dispersion;
b) the average of the intra-dispersions
c) the intergroup dispersion;
g) the total variance.
Check the correctness of the calculations using the rules for calculating the share of dispersions.