Tailoring Pty Ltd is a professional e-tailer having 87 catalogue websites on the web. The style of a website (color scheme, graphics, logos, etc. ) may impact its sales, as per Naidu, Sales Director. He chooses three design styles (neon, old world, and elegant) and assigns six catalogue websites to each design style at random. Naidu's alternate hypothesis is O A. At least one mean is different from the others. OB. /1 /2 /43 O C. /1 /2 > /13In regression analysis, r-squared is also called the Select one: O A. coefficient of determination O B. residual O C. standard error of the estimate O D. coefficient of correlation