Question 1 2 pts Which of the following sampling schemes involves the least amount of bias? o An epidemiologist measuring lung cancer incidence in a cohort of middle-aged adults born in the same decade o A merchant soliciting feedback on its product by an email survey to customers who purchased it A student measuring protein concentration in cellular emacts prepared one week apart o A hospital studying weight change in patients it has seen twice in the last year Question 2 2 pts Which of the following statistical measurements comes from the most well-defined population? o The average human height o The average age of smoking initiation in LIS middle schcal students The average number number of bristles on a Drosophila appendage o The average temperature at 12 pm Question 3 2 pts Which of the following is an example of a discrete variable? Driver endorsement of seatbelt wearing on an Agree-Oisagree o The length of time spent in traffic jams o The number of car accidents per year o Gasoline mileage