4 Random sampling from four normally distributed populations produced the following data: (You may find it useful to reference the E able.) points -17 eBook Print picture Click here for the Excel Data File a. Calculate the grand mean. (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.) Grand mean b. Calculate SSTR and MSTR. (Round final answers to 4 decimal places.) eBook SSTR Print MSTR references 4 c. Calculate SSE and MSE. (Round final answers to 4 decimal places.) points SSE MSE eBook 4 . Specify the competing hypotheses in order to determine whether some differences exist between the population means. He: HA = HB = HC; HA! Not all population means are equal. He: MA 2 HB 2 uci HA: Not all population means are equal. He: HA S HB S HC; HA: Not all populat means are equal. eBook Print ferences -1. Calculate the value of the F(df1, df2) test statistic. (Round final answer to 3 decimal places.) Test statistic 4 e-2. Find the p-value. 20 . 0.01