It is advertised that the average braking distance for a small car traveling at 70 miles per hour equals 120 feet. a transportation researcher wants to determine if the statement made in the advertisement is false. she randomly test drives 37 small cars at 120 miles per hour and records the braking distance. the sample average braking distance is computed as 111 feet. assume that the population standard deviation is 24 feet.

a. state the null and the alternative hypotheses for the test.

b. calculate the value of the test statistic and the p-value.

c. the p-value is:

d. use α = 0.05 to determine if the average breaking distance differs from 120 feet.

e. repeat the test with the critical value approach.

1. an economy consists of three workers: larry, moe, and curly. each works 10 hours a day and can produce two services: mowing lawns and washing cars. in an hour, larry can either mow one lawn or wash one car; moe can either mow one lawn or wash two cars; and curly can either mow two lawns or wash one car. a. calculate how much of each service is produced under the following circumstances: a. all three spend all their time mowing lawns. b. all three spend all their time washing cars. c. all three spend half their time on each activity d. larry spends half of his time on each activity, while moe only washes cars and curly only mows lawns b. using your answers to part a, draw a production possibilities frontier and label points a, b, c, and d on your graph. explain why the production possibilities frontier has the shape it does. c. are any of the allocations calculated in part a inefficient? explain.