Refer to Exercise 8.16 and the Analytical Chemistry (Dec. 15, 2009) study in which scientists used high-performance liquid chromatography to determine the amount of drug in a tablet. Recall that 25 tablets were produced at each of two different, independent sites. The researchers want to determine if the two sites produced drug concentrations with different variances. A Minitab printout of the analysis follows. Locate the test statistic and p-value on the printout. Use these values and a = .05 to conduct the appropriate test for the researchers.

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Test and Cl for Two Variances: Content vs Site Method Mull hypothesie Alternative hypothesis ot1) / o(2) 1 Significance level e(1) / e12) - 1 a- 0.05 I method was used. This method is accurate for normal data only. Statistica 954 CI for site seDev Variance StDeva 9. 406 11.147 (2.395, 4.267) (2.607, 4.645) 25 3.067 25 3.339 Batio of standard deviations Ratio of variances = 0.84 0.919 $5% Contidence Intervals CI for Variance Ratio (0.610, 1.384) (0.372, 1.915) CI for StDev Ratio Method Tests Test Method DF1 Dr2 statistie P-Value 0.681 24 24 0.84