Question

22. Your gas gauge in your car is broken. You believe you have enough gas to get to school. if the null hypothesis is that you have enough gas to get to school, then which of the following would be an example of a Type I error? A. On your way to school, you choose not to stop for gas, you run out, but your mom picks you up on the side of the road and you still make it to your first class on time. B. On your way to school, you choose not to stop for gas, but you are late for your first class because you slept in. C. On your way to school, you stop at a gas station and put gas in your car but it only takes a few gallons because there was already plenty in the tank. D. On your way to school, you stop at the local gas station, put gas in your car, and it takes 11.9 gallons and your car has a 12 gallon tank. 23. An economist is studying worker salaries. He first divides workers into groups by education level (less that high school diploma, high school diploma, college degree, graduate degree). He randomly selects 50 workers from each group and combines them to form a sample. What sampling technique was used? A. Simple Random Sample B. Cluster Sample C. Stratified Sample D. Systematic Sample 24. A random sample of 9 trout is taken from a lake. the length of the trout (in inches) were: 28, 17.9, 12.5, 18.3, 20.4, 24.6, 13.2, 25.1, 22. A 90% confidence interval for the true mean length of fish in the lake is given by: A. (11.482, 28.919) B. (14.391, 25.492) C. (16.937, 23.507) D. Cannot be done

Answer 1

(22) Option C is correct.

(23) Stratified sampling method has been used.

(24) Option C is correct.