In a negatively skewed distribution
If a continuous random variable x has the probability density function
For a frequency distribution of a discrete variable, the diagram of less than type cumulative frequency is a
It is known from past experience that in a certain plant there are on the average 4 industrial accidents per month. The probability that in a given month there will be less than 4 accidents is : (e4= 0.0183)
For a frequency distribution of a variable x, mean = 32, median = 30. The distribution is :
Let x be a random variable with probability mass function
ƒ(x) = k, |x|, if x = -2, 1, 3
=0, otherwise
where, K is a constant. Then the variance of x is :
