Download Chem 417 Ch 1 Practice Problems

Chem 417 Ch 4 Practice Problems
Exercise 4-A
For the numbers 116.0, 97.9, 114.2, 106.8, and 108.3, find the mean, standard deviation,
range, and 90% confidence interval for the mean. Using the Q test, decide whether the
number 97.9 should be discarded.
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Exercise 4-E
A reliable assay shows that ATP content of a certain cell type is 111 mol/100 mL. You
developed a new assay, which gave the following results for replicate analyses: 117, 119,
111, 115, 120 mol/100 mL (average 116). Can you be 95% confident that your result
differs from the “known” value?
Problem 4-22
Using the Q test, decide whether the value 216 should be rejected from the set of results
192, 216, 202, 195, and 204.
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Problem 4-29
Using the calibration curve in Figure 4-11, find the quantity of unknown protein that
gives a measured absorbance of 0.264 when a blank has an absorbance of 0.095.
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