I\'m confused on the calculations and how to set the problem up. Question #46. C

Question

I'm confused on the calculations and how to set the problem up.

Question #46. Concentration of thiol in the lysate of blood was determined for two groups of volunteers: (1) Group I (healthy volunteers) and (2) Group II (volunteers suffering from rheumatoid arthritis). The following data was obtained: Group I: 1.84, 1.92, 1.94. 1.92. 1.85, 1.91, 2.07 Group II: 2.81, 4.06, 3.62, 3.27, 3.27, 3.76 A t-test (P = 0.05 or 95% confidence level) based on this data should lead to this conclusion regarding the means obtained for the two groups of volunteers: (1) The two means differ significantly: (2) The two means do not differ significantly; (3) Not enough data to draw a conclusion: (4) None of the above

Explanation / Answer

Therefore, the answer is 1) The two means differe significantly

Sample size n1= 7 Sample size n2 = 6 Mean Xbar1 = 1.921429 Mean Xbar2 = 3.465 S1= 0.075593 S2 0.440488 Significance level alpha 0.05 Degrees of freedom df= 11 Pooled variance S^2 = (n1s1^2+n2S2^2)/(n1+n2-2)= 0.091312

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