Question

In: Math

A)Test the significance of the population correlation coefficient r (t-test using        α = 5%) B)Test the...

A)Test the significance of the population correlation coefficient r (t-test using        α = 5%)

B)Test the significance of the population regression coefficient b1 (t-test using        α = 5%)

C)Interpret the Coefficient of Determination as measure of the goodness of the fit (R2). Data sets are below and Thanks!

Unemployment Inflation
4.0 3.0
4.1 4.1
4.0 5.9
3.8 -0.6
4.0 1.8
4.0 5.8
4.0 2.9
4.1 0.0
3.9 5.2
3.9 1.7
3.9 1.7
3.9 2.3
4.2 5.7
4.2 2.3
4.3 0.6
4.4 1.7
4.3 5.1
4.5 2.3
4.6 -1.7
4.9 0.0
5.0 4.0
5.3 -2.8
5.5 -0.6
5.7 -0.6
5.7 1.7
5.7 1.7
5.7 3.4
5.9 3.9
5.8 0.6
5.8 1.1
5.8 2.2
5.7 2.8
5.7 1.7
5.7 2.2
5.9 1.7
6.0 1.1
5.8 3.3
5.9 5.5
5.9 4.4
6.0 -4.4
6.1 -0.6
6.3 1.1
6.2 2.2
6.1 3.8
6.1 2.7
6.0 -0.5
5.9 -1.1
5.7 2.2
5.7 4.3
5.6 3.2
5.7 4.3
5.5 1.1
5.6 5.9
5.6 3.2
5.5 0.0
5.4 1.1
5.4 1.6
5.4 5.8
5.4 2.1
5.4 0.0
5.2 1.1
5.4 3.7
5.1 5.7
5.1 4.7
5.1 -0.5
5.0 -0.5
5.0 6.2
4.9 5.6
5.1 12.2
4.9 2.5
5.0 -6.5
4.9 -0.5

Solutions

Expert Solution

Independent variable, X: Unemployment

Dependent variable, Y: Inflation

Following is the output of regression analysis;

SUMMARY OUTPUT
Regression Statistics
Multiple R 0.127383261
R Square 0.016226495
Adjusted R Square 0.002172588
Standard Error 2.7536036
Observations 72
ANOVA
df SS MS F Significance F
Regression 1 8.75448263 8.75448263 1.154589606 0.286280391
Residual 70 530.7632951 7.582332788
Total 71 539.5177778
Coefficients Standard Error t Stat P-value Lower 95% Upper 95%
Intercept 4.693261456 2.337815171 2.007541706 0.048553722 0.030636179 9.355886732
Unemployment, X -0.480458221 0.447138234 -1.074518314 0.286280391 -1.372247297 0.411330855

A)

Hypotheses are:

The correlation coeffciient is:

r = -0.12738

Degree of freedom: df=n-2=70

Test statistics:

The p-value is: 0.2863

Since p-value is greater than 0.05 so we fail to reject the null hypothesis.

b)

Hypotheses are:

Test statistics:

The p-value is: 0.2863

Since p-value is greater than 0.05 so we fail to reject the null hypothesis.

C)

The R-square is:

R -square = 0.0162

That is 1.62% of variation in dependent variable is explained by independent variable.


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