One line of radial tires produced by alarge company has a wear -out life that can be modeled using a normal distribution with a mean of 25,000 miles and a standard deviation of 2,000 miles . Determine each of the following
a. The percentage of tires that can be expected to wear out ±2,000 miles of the average (i.e.,between 23,000 miles and 27,000 miles)
b. The percentage of tires that can be expected to fail between 26,000 miles and 29,000 miles.
c. For what tire would you expect 4 percent of the tires to have worn out ?
