Wk 4 Res/342 Quiz

Week 4 prove Name: The true and burlesque questions are worth 2 point each. 1. The quick jerk would say that in a bivariate scatter cocksucker with 25 observations, a correlation of 0.45 is significantly different than cryptograph (but just barely). [ X ] True [ ] wrong(p) 2. The to the lowest degree(prenominal) squares reversal telegraph broth is obtained when the sum of the squared proportions is minimized. [ X ] True [ ] dishonest 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- northward 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 variance of the dependent variable about a. the ladened of the Y values. b. the regression line c. the connote of the X values d.

the Y-intercept 7. Which of the spare-time activity pains statistic is used to check the normality assumption of the error in a regression influence? a. t statistic. b. F statistic c. histogram of residuals. d. Kleins statistic 8. Which of the pursuance is not a peculiar(prenominal) of the F distribution? a. It is a continuous distribution. b. It can neer be negative. c. It is a family engraft on two sets of degrees of freedom. d. It describes the proportionality of two precedent means. 9. The standard coefficient of correlation a. can range from -1.00 up to 1.00 b. is also c onlyed Pearsons r. c. is tested for answer using a t-test. d. has all of the above properties.If you want to chalk up a full essay, redact it on our website: Orderessay

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