The box plots show the average speeds, in miles per hour, for the race cars in two different races. average speeds of cars in race a average speeds of cars in race b one-half of cars travel at which speeds? between 120 and 143 mph in race a; between 125 and 140 mph in race b between 120 and 170 mph in race a; between 125 and 165 mph in race b between 120 and 153 mph in race a; between 125 and 145 mph in race b between 165 and 170 mph in race a; between 150 and 165 mph in race b