The sales of five salesgirls on a certain day are as foll...
The sales of five salesgirls on a certain day are as follows; GH¢ 26.00, GH¢ 39.00, GH¢ 33.00, GH¢ 25.00 and GH¢ 37.00. Calculate the standard deviation if the mean sale is GH¢ 32.00.
GH¢ 5.65
GH¢ 5.66
GH¢ 6.5
GH¢ 6.56
Correct answer is B
| \(x\) | \(x - \bar{x}\) | \((x - \bar{x})^{2}\) |
|
26.00 |
-6 | 36 |
| 39.00 | 7 | 49 |
| 33.00 | 1 | 1 |
| 25.00 | -7 | 49 |
| 37.00 | 5 | 25 |
| \(\sum (x - \bar{x})^{2}\)=160 |
\(S.D = \sqrt{\frac{(x - \bar{x})^{2}}{n}}\)
\(S.D = \sqrt{\frac{160}{5}} = \sqrt{32}\)
= \(GH¢ 5.656 \approxeq GH¢ 5.66\)
In how many ways can 9 people be seated on a bench if only 3 places are available? ...
Simplify \(\frac{\sqrt{128}}{\sqrt{32} - 2\sqrt{2}}\)...
If \(^nC_2\) = 15, find the value of n...
Find the domain of \(f(x) = \frac{x}{3 - x}, x \in R\), the set of real numbers....
Consider the following statements: p: Birds fly q: The sky is blue r: The grass is green W...
Given that \(y = x(x + 1)^{2}\), calculate the maximum value of y....
If \(\sqrt{x} + \sqrt{x + 1} = \sqrt{2x + 1}\), find the possible values of x....
A body is kept at rest by three forces \(F_{1} = (10N, 030°), F_{2} = (10N, 150°)\) and \(F_...