The probability that your call to a service lino is answered

The probability that your call to a service lino is answered in less than 30 seconds is 0 .75. Assume that your calls are independent. What is the mean number you must make until one is answered in less than 30 seconds? Which distribution does the random variable follow? Weibull Hypergeometric Gamma Negative Binomial Binomial Lognormal Poisson Normal Exponential

Solution

THE ANSWER FOR THIS QUESTION IS EXPONENTIAL

WHY EXPONENTIAL DISTRIBUTION?

BECAUSE A EXPONENTIAL DISTRIBUTION HAS THEIR EVENTS INDEPENDENTS, AND THE PROBLEM SAID THAT THE CALLS ARE INDEPENDENTS

AND OTHER THINGS THE VARIABLE IS CONTINUOUS, SO THE EXPONENTIAL DISTRIBUTION WOULD BE THE BEST OPTION

IF THE VARIABLE WAS DISCRETE , THEN IT WOULD BE POISSON DISTRIBUTION

BUT THE MINUTES , SECONDS , ARE CONTINUOUS VARIABLES