A second pH meter, whose measurement uncertainty is NOT known, makes five replicate measurements of the pH of another solution:
4.37, 4.42, 4.35, 4.41, 4.48
The mean and sample standard deviation for the above set of values are calculated as:
Sample standard deviation, s = 0.050
iii) 95% confidence deviation and
iv) 95% confidence interval
for the true value of the pH of the solution.
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