A. 6
B. Zero
C. 3
D. 2
Related Mcqs:
- If the standard deviation of the values 2, 4, 6, 8 is 2.58, then the standard deviation of the values 4, 6, 8, 10 is_______________?
A. 0
B. 2.58
C. 5
D. 4.66
E. 2.33 - Mean Deviation, Variance and Standard Deviation of the values 4, 4, 4, 4, 4, 4 is_________________?
A. 4
B. 8
C. 2
D. 12
E. 0 - If the standard deviation of the values 2,4,6,8 is 2.33, then the standard deviation of the values 4,6,8,10 is_____________?
A. 0
B. 2.58
C. 4.66
D. 2.33 - Mean deviation, Variance and Standard Deviation of the values 4,4,4,4,4,4 is_______________?
A. 4
B. 8
C. 2
D. 0 - The standard deviation is always _________ than mean deviation?
A. Greater
B. Less
C. Equal
D. None - The mean deviation of the values, 18, 12, 15, is_______________?
A. 6
B. Zero
C. 3
D. 2 - Random samples of size 17 are from a population that has 200 elements, a mean of 36, and a standard deviation of 8. which of the following best describes the from of the sampling distribution of the sample mean for this situation ?
A. Approximately normal because the sample size is small relative to the population size
B. Approximately normal because of the central limit theorem
C. Exactly
D. None of these alternatives is correct - If variance iv standard deviation is minimum if the deviation taken from______________?
A. Mode
B. Mean
C. Average
D. G.M. - The mean of a distribution is 14 and the standard deviation is 5. What is the value of the coefficient of variation ?
A. 60.4%
B. 48.3%
C. 35.7%
D. 27.8% - Standard deviation is calculated from the Harmonic Mean (HM) ________________?
A. Always
B. Sometimes
C. Never
D. None of these
5 Comments
Right answer is ZERO.
Mean Deviation = Σ|x − μ|/N
calculate mean of 18,12,15 =(18 +12+15) / 3= 15
M.D = Σ|(18-15) + (12-15) + (15-15)|/3
M.D = Σ|+3 – 3 +0|/3
M.D = 0
when we use the standard bracket I—–I then we consider the negative values as positive so I+3-3+0I/3 TO I+3+3-0I/3= 2
Correct answer is 2…. Your answer is wrong as it is clearly defined in the concept while calculating deviation, signs whatsoever needs to be ignored …
the rule u r applying is wrong…
procedure is as
first we have to calculate mean
that is 18+12+15/ 3 = 15
Now in order to calculate deviation we have to
Substract 15 from each given number …
that is __ 18 – 15 = 3
12- 15 = -3
15 -15 = 0
——-
6
_______
signs ignored as per the concept
Deciation is 6
MD = 6 / N
MD = 6/3
MD = 2
Mean Deviation = Σ|x − μ|/N
calculate mean of 18,12,15 =(18 +12+15) / 3= 15
M.D = Σ(|18-15|+ |12-15| + |15-15|)/3
M.D = Σ|+3 + 3 +0|/3
M.D = 2
Negative sign will convert into positive bcz of absolute in the mean devation formula