Last year, a person wrote 119 checks. let the random variable x represent the number of checks he wrote in one day, and assume that it has a poisson distribution. what is the mean number of checks written per day? what is the standard deviation? what is the variance?

The mean number of checks written per day = 0.3260

The standard deviation = 0.5710

The variance = 0.3260

Step-by-step explanation:

Given : The number of checks written by the person = 119

We assume that the year is not a leap year.

Thus, the number of days in the year must be 365.

Now, the mean number of checks written per day is given by :-

Also, in Poisson distribution , the variance is also equals to the mean value .

Then ,

Thus,  Standard deviation = 0.5710

answer: i think one of the answer is $150 and $300?

step-by-step explanation: