The results of the analysis of a metal alloy were reported in terms of percent Cu (%Cu). The values obtained are 17.34%, 17.33%, 17.28%, 17.29%, 17.36%. The expression of the central value significant to chemists is the arithmetic mean (or average) is the sum of the measured values, x;, divided by the n, number of replicate measurements. x, +x, + x, +...+: Ex n a. The mean or the average %Cu is SOLUTION:
The results of the analysis of a metal alloy were reported in terms of percent Cu (%Cu). The values obtained are 17.34%, 17.33%, 17.28%, 17.29%, 17.36%. The expression of the central value significant to chemists is the arithmetic mean (or average) is the sum of the measured values, x;, divided by the n, number of replicate measurements. x, +x, + x, +...+: Ex n a. The mean or the average %Cu is SOLUTION:
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Transcribed Image Text:The results of the analysis of a metal alloy were reported in terms of percent Cu (%Cu). The values
obtained are 17.34%, 17.33%, 17.28%, 17.29%, 17.36%.
The expression of the central value significant to chemists is the arithmetic mean (or average) is the sum of
the measured values, x;, divided by the n, number of replicate measurements.
x, +x, + x, +...+:
Ex
n
a. The mean or the average %Cu is
SOLUTION:
Transcribed Image Text:d. The standard deviation, s, measures how closely the data are clustered about the mean. The smaller
the standard deviation, the more closely the data are clustered about the mean, the more precise is
the measurement. For a finite number of measurements, the standard deviation, s is
(n–1)
(п-1)
IMPORTANT: The average and the standard deviation should end at the same decimal place.
The standard deviation, s, of the results of the %Cu present in the metal alloy is
SOLUTION:
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