What is the standard deviation of a data set if the data set has a variance of 0.81?
A0.2
B0.41
C0.9
D9
A0.2
B0.41
C0.9
D9
Related Questions:
The table shows the number of workers of different categories in an office , grouped according to their daily wages. What is the mean daily wages?
Daily wages(Rs) | Number of workers |
675 | 8 |
730 | 4 |
755 | 4 |
780 | 3 |
840 | 1 |
The table classifies 40 persons who took a test according to the marks they scored: Calculate the mean marks scored.
Marks | Persons |
0 - 10 | 4 |
10 - 20 | 6 |
20 - 30 | 16 |
30 - 40 | 8 |
40 - 50 | 6 |
Study the following graph and answer the question given below. The below Histogram shows the data of the annual rainfall (in cm).
The number of times annual rainfall below 120 cm is what percent of the number of times the annual rainfall above 130 cm?