# Econometrics RFEI (10 tasks) Word and Excel

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# Description

TASKS FOR VERIFICATION work on the course "econometrics" RFEI (10 tasks)

The solution to all problems in Word and Excel (work credited correctly)
At seven in the Urals Federal District in 2006 the values of the two signs (Table. 1).

Objective 1.
At seven in the Urals Federal District in 2006 the values of the two signs (Table. 1).
Table 1 - Indicators of the Urals Federal District in 2006
Region
Expenditure on food
commodities in the total expenditures,%, at
Average daily salary of one employee, standard units, x
Udmurtia.
68.8
45.1
Sverdlovsk region.
61.2
59.0
Bashkortostan
59.9
57.2
Chelyabinsk region.
66.7
61.8
Perm region.
55.0
58.8
Kurgan region.
54.3
47.2
Orenburg region.
49.3
55.2
What kind of a linear regression defined by the equation, characterizing the dependence of the cost of purchasing food commodities in the total expenditures?
A) yx = 76,88 - 0,35x;
B) yx = 47,68 - 0,87x;
In) yx = 83,52 - 0,71x.
Objective 2.
What is the linear correlation coefficient based on the conditions of the problem 1?
A) rxy = -0,473;
B) rxy = -0,200;
In) rxy = -0,582.
What is the value of the average error of approximation, based on the conditions of the problem 1?
A) A = 8.1%;
B) A = 12.2%;
B) A = 7.8%.
What kind of power corresponds to the model according to the cost of purchasing food commodities in the total expenditures, based on the conditions of the problem 1?
A) yx = 186,5 x -0.568;
B) yx = 176,3 x -0.381;
In) yx = 189,7 x -0.298.
In areas of the region presents data for 2006 (table 2).
Table 2. Indicators of regions according to 2006
Region Number Average cost of living of the working week, cond. u, x Average weekly wages cond. u have
1
78
133
2
82
148
3
87
134
4
79
154
5
89,162
6
106
195
7
67
139
8
88,158
9
73
152
10
87
162
eleven
76
159
12
115173
What kind of a linear regression equation pair from dependence on x average weekly wage of the average weekly cost of living for one able-bodied person?
A) yx = 77.0 + 0.92 x;
B) uh = 69.3 + 0.87 x;
B) yx = 74.1 x 0.43.
Problem 6. What is the value of tightness linear relationship (correlation coefficient) on the condition of the problem 5?
A) r xy = 0.659;
B) r xy = 0,852;
B) r xy. = 0.721.
Problem 7. Is the quality of the model based on the condition of the problem 5 (average approximation error}?
A) A = 8.5%;
B) A = 5.7%;
B) A = 7.8%.
Problem 8. In a group of companies that produce homogeneous products, it is known as a dependent unit cost factor V on -
production volume, mln. rub., X. Data are presented as Table. 3.
Table 3 - Dependence of the cost of production of output
Priznak- factor regression equation pair average value of factor
Volume of production, million rubles., X y = 0.62 + 58.74 1 / X X = 2,64
What is the power factor of influence on the result determined by the coefficient of elasticity?
A) E = -0.973%;
B) E = -0.798%;
B) E = -0,865%.
Task 9. The dependence of demand for pork x1 from prices are x2, and the price of beef x3, represented by the equation
lgx1, = 0,1274 -0,2143- lgh2, +2.8254 -Igh3
What kind of equations in natural form (not in logarithms)?
A) x1 = 7.1823 x2 x3 2.2854 -0.2143;
B) x1 = 1.3409 x2 x3 2.8254 -0.2143;
B) x1 = 1.7811 x2 x3 0.456 -2.8254.
Problem 10. Dynamics of productivity in 10 years is shown in Table 4. To determine at what value the level of a number of series is abnormal at
t = 4. (tabular values should be taken from Table 3.4 of the course Econometrics Lecture 2).
Table 4 - Dynamics yield 10 years
The time period, t 1 2 3 4 5 6 7 8 9 10
Yields, y 16,3 21,2 18,1 8,7 16,3 17,3 20,9 15,4 19,7 21,7
A) λ = 0.785;
B) λ = 1,151;
B) λ = 2.446.

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