Question 1
A local TV station wanted to report average gasoline prices in the early summer of 2000 in Illinois. Which sample might evidence bias on the part of the reporter?
◦ Prices reported by the station employees
◦ Prices reported by 30 gasoline stations uniformly distributed throughout the state
◦ Prices reported by the first 30 callers to respond to a request for the last price paid for gasoline
◦ Prices reported by 30 gasoline stations uniformly distributed throughout the viewing area
Question 2
A college student who does laundry infrequently wants to determine the effect of blueing on white clothes. Which sample is most likely to give biased data?
◦ Two loads of personal wash, one with, one without blueing
◦ The reports of an internet chatroom on laundry techniques
◦ Reports of two friends, one of whom was given blueing
◦ Two loads of wash, one personal, one of a friend, the blueing assigned by a coin flip
White-winged Duck or White-winged Wood Duck (Asarcornis scutulata)
scanning electron micrograph showing an ovum (pink) released by the ovary at ovulation surrounded by
Effect of the direction of flagellar rotation
Greenhouse Effect
Effect of Phosphate Pollution