Question

ch 8 a student asks each person in one of his classes how many hours, on average, they spend studying each week. this is an example of
a double-blind experiment.
convenience sampling.
a simple random sample.
voluntary response sampling.

question 9
1 pts
ch 8 the following are biases due to nonsampling except
response
bias due to voluntary response
undercoverage
nonresponse.

Explanation:

First Question (about sampling type)

• A double - blind experiment involves both researchers and participants being unaware of certain aspects (like treatment groups), which is not the case here.
• Convenience sampling uses a sample that is easy to access, like the student's own class (easy to reach).
• A simple random sample requires a random selection from the entire population, not just a convenient group.
• Voluntary response sampling is when people self - select to respond, but here the student is asking each person in the class, not a self - selected group.

• Response bias, nonresponse bias, and undercoverage are types of nonsampling bias.
• Bias due to voluntary response is a type of sampling bias (related to how the sample is selected, as voluntary response is a sampling method issue), while the others are nonsampling biases (issues not related to the sampling method itself, like how people respond or who is missed in data collection).

Answer:

B. convenience sampling.

Second Question (about nonsampling bias)