Statistic quiz (regressin & random variables & portfolio analysis) Essay Example

Subject: Mathematics

Question 1

None of the regression coefficients is different from zero

Question 2

Question 3

Dummy variable

Question 4

Question 5

Both the dummy variable and the non-dummy variable are significant

Question 6

Question 7

Two or more of the independent variables

Question 8

The standard deviations of regression coefficients are underestimated

Question 9

Correlation matrix

	-0.24121
	0.620616	-0.35896
	0.278395	-0.16089	0.243151
	-0.72429	0.325018	-0.44185	-0.27783

Pairwise correlation:

Question 10

	Residential Electricity (kWh)	Residential Natural Gas (1000 ft3)	Residential Fuel Oil (gal)	Leaded Regular Gasoline
Residential Electricity (kWh)
Residential Natural Gas (1000 ft3)	0.964109644
Residential Fuel Oil (gal)	0.497928021	0.570267926
Leaded Regular Gasoline	0.6876106	0.700889858	0.9338525

Correlation between natural gas and fuel oil equals 0.570

Correlation between natural gas and gasoline equals 0.701

Correlation between gasoline and fuel oil equals 0.934

Question 11

0		0

Question 12

0		0	0

Question 13

Question 14

Question 15

				A^2p(A,B)		B^2p(A,B)	ABp(A,B)
0	0		0	0	0	0	0
0			0	0			0
	0				0	0	0

Question 16

Question 17