Chapter 10.2, Problem 17P

(a)

To determine

Find the probability that the number of accidents per day.

(b)

To determine

Find the expected number of accidents $E=90P\left(r\right)$ for $r=0,1,2,3,4\text{ or more}$.

(c)

To determine

Find the sample statistic ${\chi }^2={\displaystyle \sum \frac{{\left(O-E\right)}^2}{E}}$.

Find the degrees of freedom.

(d)

To determine

Check whether the Poisson distribution fits the sample data or not.