Refer to Exercise 7.84 and the Analytical Chemistry (Dec. 15, 2009) study

Refer to Exercise 7.84 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. In Exercise 7.84 you used a 95% confidence interval to determine if the two sites produce drug concentrations with different variances. Now make the inference with a test of hypothesis at Use the information provided in the MINITAB printout.

Data from Exercise 7.84

Refer to Exercise 7.39 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 produce drug concentrations with different variances.

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