Question
A sample of 25 measurements is: 7 5 6 9 6 10 11 7 8 7 9 7 11 7 9 9 10 12 8
A sample of 25 measurements is:
7
5
6
9
6
10
11
7
8
7
9
7
11
7
9
9
10
12
8
10
7
10
7
8
6
a. Compute , s2 and s for this sample.
Answer: ________________s2_______________ s__________________
Count the number of observations in the intervals , 2, 3 . Express each count as a percentage of the total number of measurements.
Compare the percentages found in part b to the percentages given by the Empirical Rule and Chebyshev's Rule.
d. Calculate the range and use it to obtain a rough approximation for . Does the result compare favorably with the actual value for found in part a.
.
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