Homework Answers
Answer
Yes
The value is statistically significant at 5% as the value is above 1.96
It is also significant if the value is negative as the value is below -1.96
but it is not significant at 99% and above confidence intervals.
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If the t-statistic for a variable is 2.54, is the variable statistically significant? No Yes
If the t-statistic for a variable is 2.54, is the variable statistically significant? Yes No
If the t-statistic for a variable is 2.54, is the variable statistically significant? Yes No
For each of the following t values (a-d), indicate whether the t statistic is statistically significant...
For each of the following t values (a-d), indicate whether the t statistic is statistically significant for a two-tailed test, at the specified alphas: t = 2.90, df = 25, α = 0.01 t = 2.20, df = 25, α = 0.05 t = 5.52, df = 10, α = 0.01 t = 2.02, df = 20, α = 0.05 CAUTION: GET ON THE RIGHT PAGE …..Make sure you use the correct table: pages 413-415 (the difference is the α:...
Which of the following statements about the t-statistic in regression is not true? a. The t-statistic...
Which of the following statements about the t-statistic in regression is not true? a. The t-statistic provides some idea of how well a predictor predicts the outcome variable. b. The t-statistic is equal to the regression coefficient divided by its standard deviation. c. The t-statistic can be used to see whether a predictor variables makes a statistically significant contribution to the regression model. d. The t-statistic tests whether the regression coefficient, b, is equal to 0.
1.Which variables are statistically significant at the 5% level? 2.Which variables are statistically significant at the...
1.Which variables are statistically significant at the 5%
level?
2.Which variables are statistically significant at the 10%
level?
3.Which variables are insignificant?
4.Please present the correlation matrix of the independent
variables.
5.Please run the White test for heteroskedasticity, with
cross-products AND PRESENT YOUR RESULTS. Please explain whether the
test is significant or not.
6.If the White test is significant, please present the
heteroskedasticity-consistent White regression results.
7.Can you test this model for autocorrelation? Why of why not?
If you do,...
Indictator(s) that multicollinearity might be a problem are: A. The regression has statistically significant t statistics...
Indictator(s) that multicollinearity might be a problem are: A. The regression has statistically significant t statistics on the slope coefficients and the F statistic is not significant. B. The R-squared value is low in a regression of one Xj on the other regressors. C. The coefficients on the independent variables have the wrong signs. D. None of these issue indicate a potential problem with multicollinearity.
Suppose you obtain a chi-square statistic of 67.81. Are your results statistically significant if the critical...
Suppose you obtain a chi-square statistic of 67.81. Are your results statistically significant if the critical value obtained from the distribution of chi-square is 3.84 with an alpha level of .05?
Researchers often indicate statistical significance with stars. No stars means the result is not statistically significant...
Researchers often indicate statistical significance with stars. No stars means the result is not statistically significant at a 10% level. One star means the result is statistically significant at a 10% level (but not a 5% level). Two stars means the result is statistically significant at a 5% level (but not a 1% level). Three stars means the result is statistically significant at a 1% level. Suppose that in testing a TWO-TAILED hypothesis test about the mean with a sample...
f the results of an “F-test” are statistically significant, that means for the variable being measured,...
f the results of an “F-test” are statistically significant, that means for the variable being measured, the variation in one of the populations is greater than the variation in the other population. True False
(d) Construct the t-statistic for the slope coefficient. Is this t-statistic significant at the 10% level?...
(d) Construct the t-statistic
for the slope coefficient. Is this t-statistic significant at the
10% level? Clearly show your work including the critical value
which you are using.
(e) Construct the t-statistic for the intercept coefficient. Is
this t-statistic significant at the 1% level? Clearly show your
work including the critical value which you are using.
(f) Does least squares assumption 1 plausibly hold for this
regression? Explain in detail why or why not.
(g) Are the errors in this...
20.9 Is It Significant? The one-sample t statistic from a sample of n = 32 tions...
20.9 Is It Significant? The one-sample t statistic from a sample of n = 32 tions for the two-sided test of Ho: u = 50 Huu# 50 has the value t - 2.10. (a) What are the degrees of freedom for t? (b) Locate the two critical values e from Table C that bracket. What are the two-sided P-alues for these two entries! (e) Is the value - 2.10 statistically significant at the 10% level? At the 5% level? At...
If the t-statistic for a variable is 2.54, is the variable statistically significant? Yes No
1.Which variables are statistically significant at the 5%
level?
2.Which variables are statistically significant at the 10%
level?
3.Which variables are insignificant?
4.Please present the correlation matrix of the independent
variables.
5.Please run the White test for heteroskedasticity, with
cross-products AND PRESENT YOUR RESULTS. Please explain whether the
test is significant or not.
6.If the White test is significant, please present the
heteroskedasticity-consistent White regression results.
7.Can you test this model for autocorrelation? Why of why not?
If you do,...
(d) Construct the t-statistic
for the slope coefficient. Is this t-statistic significant at the
10% level? Clearly show your work including the critical value
which you are using.
(e) Construct the t-statistic for the intercept coefficient. Is
this t-statistic significant at the 1% level? Clearly show your
work including the critical value which you are using.
(f) Does least squares assumption 1 plausibly hold for this
regression? Explain in detail why or why not.
(g) Are the errors in this...
20.9 Is It Significant? The one-sample t statistic from a sample of n = 32 tions for the two-sided test of Ho: u = 50 Huu# 50 has the value t - 2.10. (a) What are the degrees of freedom for t? (b) Locate the two critical values e from Table C that bracket. What are the two-sided P-alues for these two entries! (e) Is the value - 2.10 statistically significant at the 10% level? At the 5% level? At...
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