2 Short answer 1 Ina stady of the rate at which the pesticid

2 Short answer 1 In,a stady of the rate at which the pesticide hexaconazole is absorbed through skin, skin specimens were exposed to 24 of hexneonazole. Four specimens were exposed for 30 minutes and four others were exposed for 60 minutes. The amounts (in ) that were isbsorbed were 30 minutes 31 3.3 34 30 F-3.2 sy 0.182574 60 minutes 3.7 3.6 3.7 3.4 X-3.6x0.141421 (1) Find a 95% confidence interval for the mean amount absorbed in the time interval between 30 and (2) Can you conclude that the amounts exposed for 60 minutes is greater than the amounts exposed t abeorbed in the tirie interval between 30 and 60 minutes after exposure. for 30 minutes?

Solution

1) alpha = 0.05

alpha / 2 = 0.025

df = 8-2=6

T = 2.447

I : 3.6 - 3.2 +/- 2.447 * srqt ( 0.182574^2+0.141421^2 / 4 )

I: 0.4 +/- 0.2825

I : [0.1175 , 0.6825 ]