Question 8 & 9, please.

thanks!

8! 8) Use the given statistics to complete parts (a) and (b). Assume that the populations are Population 1 Population 2 normally distributed. n 28 23 (a) Test whether , > U2 at the a = 0.01 level of significance for the given sample data. X 46.3 42.2 (b) Construct a 99% confidence interval about H1 - H2. 5.4 11.69! 9) The table to the right contains observed values and expected values in parentheses X1 X2 X3 for two categorical variables, X and Y, where Y 34 41 50 variable X has three categories and variable (35.91) (42.82) (46.27) Y has two categories. Use the table to 18 21 17 complete parts (a) and (b) below. Y2 (16.09) (19.18) (20.73) (a) Compute the value of the chi-square test statistic. (b) Test the hypothesis that X and Y are independent at the a=0.05 level of significance