Question 1197818
Using a 95% confidence interval:  z = 1.96
n = 64 , x-bar = 3.2
ME =  {{{z*sigma/sqrt(n)}}}
3.2 ±  {{{1.96*.8/8}}}
3.2 ±  .2
CI(3, 3.4)
what will be the upper and lower limits of the confidence 
interval "for the mean number of accidents per intersection per year"?
CI states that there will be from 3 to 3.4 accidents per intersection  per year.