1.Based on the model N(1158,87) describing steerweights, what are the cutoff values for

a) the highest10% of theweights?

b) the lowest20% of theweights?

c) the middle40% of theweights?

2.Use the Normal model N(1113,82) for the weights of steers.

a) What weight represents the 33rd percentile?

b) What weight represents the 93rd percentile?

c) What's the IQR of the weights of thesesteers?

3.Fuel economy estimates for automobiles built one year predicted a mean of 25.8mpg and a standard deviation of 5.2mpg for highway driving. Assume that a Normal model can be applied. Use the 689599.7 Rule to complete.

About what percent of autos should get more than 31 mpg?

Using the68-95-99.7 rule, about _____% of autos should get more than 31 mpg.