Question 1
The Director of Food Operations at a small college campus wants to determine student concerns about cafeteria food. Select the sample most likely to evidence bias.
◦ A randomly selected group of 30 students leaving the dining hall after a Friday dinner
◦ A randomly selected group of 30 registered students
◦ A randomly selected group of 30 students who have signed food contracts
◦ A randomly selected group of 30 students entering the dining hall before dinner
Question 2
A researcher wants to determine the relative merits of oak and maple as firewood. Which process is most likely to bias the results of the study?
◦ Comparisons by 5 friends, none of whom have a wood burning fireplace, of the fires of fifteen pieces of each type of wood obtained from friends with woodpiles
◦ Personal judgement of the fires of 15 pieces of each type of wood picked up from the floor of a hardwood forest
◦ Comparison of the reports of wood burners on the internet
◦ The judgments of the quality of a wood fire by 30 friends, half of whom burn only oak, half of whom burn only maple
The respiratory system and the process of gas exchange
Daily Variations in Temperature and Relative Humidity
Determine the exact value of each trig ratio.
Determine the # of real roots from the equation
Determine the enthalpy change of this reaction
Determine the legnth of x to the nearest tenth of a metre