Police Chief Edward Wilkin of River City reports 500 traffic citations were issu
ID: 3203503 • Letter: P
Question
Police Chief Edward Wilkin of River City reports 500 traffic citations were issued last month. A sample of 35 of these citations showed the mean amount of the fine was $54, with a standard deviation of $4.50.
Construct a 95% confidence interval for the mean amount of a citation in River City. (Round your answers to 2 decimal places. )
Police Chief Edward Wilkin of River City reports 500 traffic citations were issued last month. A sample of 35 of these citations showed the mean amount of the fine was $54, with a standard deviation of $4.50.
Explanation / Answer
ans=
x-bar = 54
ME = 1.96*4.5/sqrt(35) = 1.4909
95% CI: 54-1.4909 < u < 54+1.4909