Scrapie is a degenerative disease of the nervous system. A study of the substance IDX as a treatment for scrapie used as subjects 24 infected hamsters. Twelve, chosen at random, were injected with IDX. The other 12 were untreated. The researchers recorded how long each hamster lived. They reported: Thus, although all infected control hamsters had died by 95 days after infection (mean ± SEM = 89 ± 1.7), IDX-treated hamsters lived up to 120 days (mean ± SEM = 109.2 ± 2.86). Readers are supposed to know that SEM stands for the standard error of the mean. (a) For the group injected with IDX , find: The mean, x¯ = , The standard deviation, s =

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.