Aptitude Tests
Twenty-eight applicants interested in working in community services took an examination designed to measure their aptitude for social work. A stem-and-leaf plot of the 28 scores appears below, in which the first column is the count per "branch," the second column is the stem value, and the remaining digits are the leaves.
Count Stems Leaves
1 4 6
1 5 9
4 6 3688
6 7 026799
9 8 145667788
7 9 1234788
-Refer to Aptitude Tests table. Use the range approximation to determine an approximate value for the standard deviation. Is this a good approximation?

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The Answer of Aptitude Tests
Twenty-eight applicants interested in working in community services took an examination designed to measure their aptitude for social work. A stem-and-leaf plot of the 28 scores appears below, in which the first column is the count per "branch," the second column is the stem value, and the remaining digits are the leaves.
Count Stems Leaves
1 4 6
1 5 9
4 6 3688
6 7 026799
9 8 145667788
7 9 1234788
-Refer to Aptitude Tests table. Use the range approximation to determine an approximate value for the standard deviation. Is this a good approximation?

Aptitude Tests Twenty-Eight Applicants Interested in Working in Community Services Took an Took