STAT 4201 Midterm: Statistics 421 EXAMIII_practice_solutions
31 Jan 2019
School
Department
Course
Professor
Document Summary
Show all of your work for partial credit. This is a closed book, closed notes, closed neighbor exam. You may use a calculator and three pages of notes. All neces- sary statistical tables are provided: a scientist is interested in the e ects of a certain drug used as a tranquilizer. She performed an experiment in which two groups of guinea pigs were injected with vary- ing doses of the drug (e. g. , group 1 received 1. 0 milligrams and group 2 received 1. 5 milligrams). She then recorded the time in seconds that it took for them to fall asleep. These times are recorded in the table below. 1. 0 mg dose rank 1. 5 mg dose rank. 14 (a) (12 pts) the scientist would like to test whether the di erences in dosage have an e ect on the length of time it takes the guinea pigs to fall asleep.
