Week 4 Quiz Name: The true and fictitious questions are worth 2 point each. 1. The quick hulk would say that in a bivariate scatter plot of ground with 25 observations, a correlation of 0.45 is significantly different than aught (but just barely). [ X ] dependable [ ] wrong 2. The least(prenominal) squares regression wire line is obtained when the sum of the squared residuals is minimized. [ X ] True [ ] bogus 3. When using the least squares method, the column of residuals always sums to zero. [ X ] True [ ] False 4. Negative coefficients in a regression ordinarily 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 undetermined sum of squares measures the variability of the dependent variable about a. the wonky of the Y value. 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 conjecture 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 devil 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 c totallyed 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, site it on our website:
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