Test-exam 2

# Based on the authors results which of the following

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Unformatted text preview: ntal lab manual last slide. 25. The two graphs below are constructed by taking a large number of calcium in fruit juice data measured by flame emission photometry. Examine the graphs carefully and select the INCORRECT statement? Calcium Content in Fruit Juice 1600 1400 1200 1000 800 600 400 200 0 0 50 Measurement 100 150 30 25 Number 20 15 10 5 0 1000 1100 1200 1300 1400 1500 1600 100 200 300 400 500 600 700 800 900 0 Calcium Content in Fruit Juice Ca, ppm Ca, ppm a. Roughly 130 students participated in this exercise. b. “Number” on the y-axis of the right graph represents the number of times the students’ data fall within a certain bin (e.g., 0 to 50ppm, 50 to 100ppm, … etc.). c. If all data are used, the mean value of Ca corresponds to the highest peak on the graph on the right, that is 100 ppm.* d. If all the data are used, the standard deviation is expected to be large. e. It is quite likely that those ppmCa greater than ~400 are wrong, possibly due to the way the solutions are preparation and/or the way...
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