Question
Compute the range and sample standard deviation for strength of the concrete (in psi). 3910 ,...
Compute the range and sample standard deviation for strength of the concrete (in psi).
3910 , 4100 , 3400 , 3000 , 2940 , 3820 , 4100 , 4050
The range is ____psi.
s=___ psi (Round to one decimal place as needed.)
Homework Answers
Answer #1
Answer:-
Given that:-
Range =Maximum value - Minimum value = 4100-2940 =1160
(2)Sample mean
| x |  |
 |
| 3940 | 258.75 | 66951.5625 |
| 4100 | 418.75 | 175351.5625 |
| 3400 | -281.25 | 79101.5625 |
| 3000 | -681.25 | 464101.5625 |
| 2940 | -741.25 | 549451.5625 |
| 3820 | 138.75 | 19251.5625 |
| 4100 | 418.75 | 175351.5625 |
| 4050 | 368.75 | 135976.5625 |
| Total | 1665537.5 |
Variance
So,
Standard deviation =
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