Among births, is the proportion of males the same as the proportion of females? A random sample of births in a major metropolitan area found 1345 boys among 2546 children. A 99% confidence interval for p the
true proportion of male births in this population is (0.5028, 0.5538).
(a) Based on the confidence interval, is there convincing evidence that the true proportion of male births in
this population differs from 0.5? Explain.
(b) What information is provided by the confidence interval that would not be provided by a significance
test?

The school track has eight lanes. each lane is 1.25 meters wide. the arc at each end of the track is 180. the distance of the home straight and the radii for the arcs in the 1st 4 lanes are given. s=85m r1=36.5m r2=37.75m r3=39m r4=40.25m part one: find the radii of lanes 5 through 8 of the track. show your work. part two: if max ran around lane one, how far did he run? show your work and explain your solution. part three: max wants to run a total of three laps around the track, choose two additional lanes (2-8) for him to run and find the distance around those two lanes. show your work and round to the hundredths. part 4: based on your lane choices in part three, what was the total distance max ran in the three laps around the track?