QUESTION # 2 (a) A laboratory that was contracted to analyze 100 soil samples for chlordane per month for 12 months is considering which of two analytical methods it should use. The client requires the results accurate at the 95% confidence. To guide the method selection a soil sample whose chlordane concentration was known to be 357 ppm, was analyzed repeatedly by both methods to give the results in the foliowing table. Determined chlordane concentrations in ppm. 308 312 325 342 317 324 355 368 398 354 358 376 Method 1 2 i. Determine whether each method can accurately quantify the analyte. ii. Is the average concentration of chlordane obtained from method 2 significantly greater than the average obtained from method 1 at the 95% CL?

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QUESTION #2
(a) A laboratory that was contracted to analyze 100 soil samples for chlordane
per month for 12 months is considering which of two analytical methods it
should use. The client requires the results accurate at the 95% confidence.
To guide the method selection a soil sample whose chlordane concentration
was known to be 357 ppm, was analyzed repeatedly by both methods to give
the results in the following table.
Method
Determined chlordane
concentrations in ppm.
1
308 312 325 342 317 324
355 368 398 354 358 376
2
i.
Determine whether each method can accurately quantify the analyte.
ii. Is the average concentration of chlordane obtained from method 2
significantly greater than the average obtained from method 1 at
the 95% CL?
Transcribed Image Text:QUESTION #2 (a) A laboratory that was contracted to analyze 100 soil samples for chlordane per month for 12 months is considering which of two analytical methods it should use. The client requires the results accurate at the 95% confidence. To guide the method selection a soil sample whose chlordane concentration was known to be 357 ppm, was analyzed repeatedly by both methods to give the results in the following table. Method Determined chlordane concentrations in ppm. 1 308 312 325 342 317 324 355 368 398 354 358 376 2 i. Determine whether each method can accurately quantify the analyte. ii. Is the average concentration of chlordane obtained from method 2 significantly greater than the average obtained from method 1 at the 95% CL?
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