Group 18-30 Group 31-45 Group 46-60 72 79 85 65 73 79 68 72 76 70 78 88 73 80 89 Assume that the data represent 3 independent random samples and that the underlying population distribution in each group is normal. a. State the hypotheses for the analysis to be used to examine the difference between the means of the 3 groups b. Determine the significance and disposition of the null hypothesis C. Plot the error bars with the 95% confidence interval 9. Use the following data to run the Chi-square test of independence. Find the expected frequencies and determine the df and using significance p