94 T he following is a sample of 25 measurements. The data are saved in the LM2_94
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94 T he following is a sample of 25 measurements. The data are saved in the LM2_94 file.
a. Compute x, s2 , and s for this sample.
b. Count the number of measurements in the intervals x { s, x { 2s, and x { 3s. Express each count as a percentage of the total number of measurements.
c. Compare the percentages found in part b with the percentages given by the empirical rule and Chebyshev’s rule.
d. Calculate the range and use it to obtain a rough approximation for s . Does the result compare favorably with the actual value for s found in part a ?
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