If the mean of a random variable X following Poisson distribution is 3, then standard deviation of the distribution is:
√3
For a Poisson distribution, the standard deviation is the square root of the mean, so the standard deviation is √3 when the mean is 3.
Similar Questions
If the standard deviation of a population is 100, then based on a sample of size 100, the standard deviation of sample mean is equal to:
A set of n values X1, X2,...,Xn has a standard deviation of 5. The standard deviation of n values X1−7, X2−7,...,Xn−7 will be:
Important Questions from Standard Deviation
A cold drink bottling plant fills bottles of 500 ml. capacity with mean of 500 ml. and a standard deviation of 5 ml. Atleast what percentage of bottles would contain cold drink between 490 ml. and 510 ml.?
The mean and standard deviation of 100 terms are 50 and 3, respectively. The sum of squares of the 100 terms is:
- Following are the ages (in years) of 6 people in a group: 25, 30, 35, 40, 45 and 50. What is the standard deviation of their ages (rounded to two decimal places)?
If the standard deviation of a population is 100, then based on a sample of size 100, the standard deviation of sample mean is equal to:
What is the median of 8, 5, 7, 9, 11, 6, 10?
