For an exponential distribution with a lambda equal to 4 the

For an exponential distribution with a lambda equal to 4, the standard deviation equal to ____.

a) 4

b) 0.5

c) 0.25

d) 1

e) 16

Solution

For an exponential distirbution,

standard deviation = 1/lambda

Thus,

standard deviation = 1/lambda

= 1/4

= 0.25 [ANSWER, OPTION C]