The true and imitation questions are worth 2 point each.
1. The quick tower would say that in a bivariate scatter darn with 25 observations, a correlation of 0.45 is significantly different than nil (but just barely).
[ X ] True
[ ] wrong
2. The least(prenominal) squares regression telegraph line is obtained when the sum of the squared residuals is minimized.
[ X ] True
[ ] False
3. When using the least squares method, the column of residuals always sums to zero.
[ X ] True
[ ] False
4. Negative coefficients in a regression usually indicate weak predictors.
[ T ] True
[ ] False
5. Non-normality of the residuals from a regression is best detected by looking at the residual plots for each predictor.
[ X ] True
[ ] False
6. The unexplained sum of squares measures the variability of the dependent variable about
a. the cockeyed of the Y values.
b. the regression line
c. the mean of the X values
d.
the Y-intercept
7. Which of the spare-time activity strain statistic is used to check the normality assumption of the error in a regression model?
a. t statistic.
b. F statistic
c. histogram of residuals.
d. Kleins statistic
8. Which of the following is not a characteristic of the F distribution?
a. It is a continuous distribution.
b. It can never be negative.
c. It is a family found on two sets of degrees of freedom.
d. It describes the ratio of two precedent means.
9. The sample coefficient of correlation
a. can range from -1.00 up to 1.00
b. is also called Pearsons r.
c. is tested for consequence using a t-test.
d. has all of the above properties.If you want to total a full essay, order it on our website: Ordercustompaper.com
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