Advertisements
Advertisements
प्रश्न
Define Poisson distribution
Advertisements
उत्तर
Poisson distribution was derived in 1837 by a French Mathematician Simeon D. Poisson.
A random variable X is said to follow a poisson distribution with parameter X if it assumes only non-negative values and its probability mass function is given by
`"P"(x, lambda) = "P"("X" = x) = {{:(("e"^(-lambda) lambda^x)/(x!), x = 0"," 1"," 2"," ......; lambda > 0),(0, "otherwise"):}`
APPEARS IN
संबंधित प्रश्न
If 5% of the items produced turn out to be defective, then find out the probability that out of 20 items selected at random there are find the mean and variance
An experiment succeeds twice as often as it fails, what is the probability that in next five trials there will be at least three successes
Choose the correct alternative:
In a parametric distribution the mean is equal to variance is
Choose the correct alternative:
An experiment succeeds twice as often as it fails. The chance that in the next six trials, there shall be at least four successes is
Choose the correct alternative:
A statistical analysis of long-distance telephone calls indicates that the length of these calls is normally distributed with a mean of 240 seconds and a standard deviation of 40 seconds. What proportion of calls lasts less than 180 seconds?
Vehicles pass through a junction on a busy road at an average rate of 300 per hour. Find the probability that none passes in a given minute
The annual salaries of employees in a large company are approximately normally distributed with a mean of $50,000 and a standard deviation of $20,000. What percent of people earn less than $40,000?
The annual salaries of employees in a large company are approximately normally distributed with a mean of $50,000 and a standard deviation of $20,000. What percent of people earn between $45,000 and $65,000?
The annual salaries of employees in a large company are approximately normally distributed with a mean of $50,000 and a standard deviation of $20,000. What percent of people earn more than $75,000
X is a normally distributed variable with mean µ = 30 and standard deviation σ = 4. Find P(X < 40)
