Exercise 1 Sodium concentrations (mEq/L) are measured 24 hours after six patients were given a diuretic agent and five patients given a placebo. Agent: 20.4 92.5 61.3 44.2 11.1 23.7 Placebo: 1.2 6.9 33.7 20.4 17.2 - Test if the variances are equal. Is the diuretic agent effective? Exercise 2 - An experiment was conducted to compare the mean number of tapeworms in the stomach of cows that had been treated against the mean in those that were not treated. After 6 months, the following worm count were recorded. Are the variances different? is there any difference in the mean no. of worms between treated and untreated cow (01:0.05) ? ' Treated : 5, 13, 18, 6, 4, 2, 15 . Untreated: 40, 50, 26, 63, 21, 37