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−ˉx | (x−ˉx)2 |
|
26.00 |
-6 | 36 |
| 39.00 | 7 | 49 |
| 33.00 | 1 | 1 |
| 25.00 | -7 | 49 |
| 37.00 | 5 | 25 |
| ∑(x−ˉx)2=160 |
S.D=√(x−ˉx)2n
S.D=√1605=√32
= GH¢ 5.656 \approxeq GH¢ 5.66
Given \sin \theta = \frac{\sqrt{3}}{2}, 0° \leq \theta \leq 90°, find \(\tan 2\the...
Given that P = {x : 1 \geq x \geq 6} and Q = {x : 2 < x < 10}. Where x are intege...
Simplify: \frac{log √27 - log √8}{log 3 - log 2}...
Evaluate \int_{1}^{2} (2 + 2x - 3x^{2}) \mathrm {d} x....
If f(x) = \frac{4}{x} - 1, x \neq 0, find f^{-1}(7)....
There are 7 boys in a class of 20. Find the number of ways of selecting 3 girls and 2 boys ...
If events A and B are independent and P(A) = \frac{7}{12} and P(A \cap B) = \frac{1}{4}, fin...
If \sqrt{x} + \sqrt{x + 1} = \sqrt{2x + 1}, find the possible values of x....
Evaluate \int_{0}^{2} (8x - 4x^{2}) \mathrm {d} x....
Two functions f and g are defined on the set of real numbers by f : x \to x^{2} + 1 and \(g : x ...