1. A supplier of TI-83 calculators claims that the average life of their calculators is 8 years. A sample of 16 calculators reveals a sample mean life of 7.8 years. The sample standard deviation is 0.2 years. Does the data suggest the average life of TI-83 calculators is not 8 years at the .05 level of significance? Assume that calculator lifetimes are normally distributed. (d) Committing a Type II error here would be (Circle one): i) Concluding the average life of the TI-83 calculator is not 8 years when in reality the average life is not 8 years. Concluding the average life of the TI-83 calculator is not 8 years when reality the average life is 8 years. Concluding it is plausible the average life of the TI-83 calculator is 8 when reality the average life is 8 years. Concluding it is plausible the average life of the TI-83 calculator is 8 when in reality the average life is not 8 ii) iii) years iv) years years. (e) Committing a Type I error here would be (Circle one): i) Concluding the average life of the TI-83 calculator is not 8 years when in reality the average life is not 8 years. ii) Concluding the average life of the TI-83 calculator is not 8 reality the average life is 8 years. iii) Concluding it is plausible the average life of the TI-83 calculator is 8 when reality the average life is 8 years. iv) Concluding it is plausible the average life of the TI-83 calculator is 8 years when in reality the average life is not 8 years. years when years