Question

Listed below are the lead concentrations in volg measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean lead concentration for all such medicines is less than 1709 7,5 20 17.5 14 16.5 11 19.5 4.5 10 17 What are the null and alternative hypotheses? OA. H: > 1799 H, με 17 μου OCH *1799 H: 1799 OBH = 1799 H > 1799 OD H1700 H17919 Determine the best statistic (Round to two decimal places as needed) State the final conclusion that addresses the original claim Ho. There is evidence to conclude that the mean lead concentration for all such medicines is 17 0 Click to select your answer not sufficient sufficient

Answer 1

137.5 a 113.75 Stemple menn (%) = [x ña 10 Sample Standard deviation (s) = [[fer x)² hol 5.2770 D Ho: M = 17 My la H,: M < 17 Myla a=0.10 na 10 , X = 13.75, 5=5•2770, the t- disbitection use Sigma hot known so we Test statistic, -3.25 13.75-17 -).947584 t= -M 1.668734 5.2170/5 To t=-1.95 Df anal i lor! -197

P-value = Po(t < -1.95) (using t table] 0.0415 Since, Prvalue is less than the d=0.10 So, Reject Ho. There is Sufficient evidence to conclude that Concentraction for all such mediciones the mean lead is less than 17 uyla