or FALSE: Which of these statements are assumptions made when performing regression analysis and associated statistical analysis? a. There exists a "true" regression line, and the curve fit based on the sample is the same form as that of the population. T F b. The R? value increases as the curve-fit order increases. T F c. Confidence intervals neglect the uncertainties of the individual x- and y-measurements. T F d. The population of y values at a given x value are normally distributed. T F e. The assumed curve fit is correct when the residuals approach zero. T F f. The distribution of residuals has the same spread about the regression line, regardless of x value. T