Question:
The standard deviation of 100 observations is 10. If 5 is added to each observation and then divided by 20, then what will be the new standard deviation?
The standard deviation of 100 observations is 10. If 5 is added to each observation and then divided by 20, then what will be the new standard deviation?
Options:
- a) 0.25
- b) 0.5
- c) 0.75
- d) 1.00
- a) 0.25
- b) 0.5
- c) 0.75
- d) 1.00
correct answer : b)
Explanation:
When 5 is added to each
observation then the standard deviation is not
changed
\ New standard deviation =
10
20
= 0.5
When 5 is added to each
observation then the standard deviation is not
changed
\ New standard deviation =
10
20
= 0.5