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Econometrics questions.

Econometrics questions.

Find Econometrics university examination questions in acaproso.com

# Question
1

A researcher has five variables in her data set which are crop yield (Y), rainfall (R), grain price (P), temperature (T), Fertilizer amount (F).

  1. In view of these variables what type linear model(s) can be adopted to test relationship between variables?
  2. Using acceptable/ standard notation specify the model(s) that could be adopted to test the relationship?
  3. State all assumptions underlying the analysis of model(s) specified in part (ii) above
  4. Mention three other variables that might be included in this model to make results more robust?

Short answers
2

Study the following output and answer the question that follow:

Summary output:

Regression Statistics
Multiple R 0.982655
R Square 0.96561
Adjusted R Square 0.959878
Standard Error 26.01378
Observations 15

 

Y=B0+B1 X1+ B2 X2 + B3 X3--- +/- Error
Total=Estimated/Predicted +/- Error

ANOVA

  df SS MS F ignificance F
Regression 2 228014.6 114007.3 168.4712 1.65E-09
Residual 12 8120.603 676.7169    
Total 14 236135.2      

 

  Coefficientstandard Ern t Stat P-value Lower95% Upper95%
intercept 562.151 21.0931 26.65094 4.78E-12 516.1931 608.1089
Temperature -5.436581 0.336216 -16.1699 1.64E-09 -6.169133 -4.704029
Insulation -20.01232 2.342505 -8.543127 1.91E-06 -25.1162 -14.90844

 

Estimated heating Oil=562.15-5.436(temperature) – 20.012(insulation)
  1. Identify the dependent and independent variable for this model
  2. Interpret the adjusted R square, F value and t-values
  3. Show how the multiple R and R-square are calculated?

Short answers
3

In hypothesis testing one can accept or reject a null hypothesis


True OR False
4

Type one error is the probability of reject a true null hypothesis


True OR False
5

Sex is a binary but not an indicator variable


True OR False
6

An exponential function cannot be estimated the way it is specified using a linear regression model.


True OR False
7

In a simple regression model the coefficient of determination is not different from correlation coefficient.


True OR False
8

Autocorrelation is a problem that afflicts cross-sectional data


True OR False
9

The alternative hypothesis contains the =, leq or geq  sign only


True OR False
10

The null hypothesis cannot contain the =, leq or geq sign


True OR False