The college newspaper printed a question asking. \"Do you think the college is o
ID: 3206575 • Letter: T
Question
The college newspaper printed a question asking. "Do you think the college is offering relevant courses?" Anyone could respond to the question on the newspapers website. 342 responses to the question were received on the website Circle one. This is an example of voluntary response sample multistage sample simple random sample convenience sample To study whether the number of years in school is related to a person's height, data was collected from a sample of 800 people on their number of years in school and their current height. The data collected in this study would be displayed best using what type of visual display (pie chart, histogram, scatterplot, two-way table, or side-by-side boxplots)? A large group of people have volunteered to participate in the testing of a new drug for treating depression in adults. The following procedure is used. Researchers use a computer program that assigns an identification number to each person and randomly assigns them into one of three groups. The first group takes a blue pill that contains the drug (real drug), the second group takes a blue pill that doesn't contain the drug (fake drug), and the third group takes no pill at all. The first and second groups don't know which pill they received (real or fake). Using the above experimental design, briefly identify and list the example of each of the following: use of a placebo: random assignment: use of a control group: blinding: What is one problem with using convenience samples for observational studies? Briefly explainExplanation / Answer
Result:
10. a. Voluntary response sample.
11. scatter plot ( used to display relation between two variables).
12.
Use of placebo: the pill that does not contains the drug.
Random assignment: assigned through computer program to assign one of 3 groups.
Use of control group: the second group is control group takes placebo.
Blinding: yes, single blinding, the person taking drug do not know which pill they are receiving.
13).
The main criticism about convenience sampling is sampling bias and that the sample is not representative of the entire population