4 A magazine interviewed 1016 randomly selected people The m

4) A magazine interviewed 1016 randomly selected people. The magazine reports that when asked when (if ever) the effects of global warming will begin to happen, 58% of respondents said the effects had already begun. Only 10% thought that they would never happen.

a)What is the population?

   A. The population is all people

   B. The population is the randomly selected people

   C. The population is everyone who believes in global warming.

b) What is the population parameter of interest?

   A. The population parameter is the randomly selected people.

   B. The population parameter is the proportion of people who believe that global warming    has already begun and the proportion who think it will never happen.

   C. The population parameter is the proportion of people who subscribe to the magazine.

c) What is the sampling frame?

   A. the sampling frame is all people who believe in global warming.

   B. The sampling frame is all people

   C. the sampling frame is all people who do not believe in global warming.

   D. The sampling frame is all adults

d) What is the sample for this study?

   A. the sample is the 1016 randomly selected people

   B. the sample is all people who believe in global warming.

   C. the sample is all adults

   D. the sample is all people who do not believe in global warming.

e) What sampling method was used?

   A. The sampling method used was systematic sampling.

   B. the sampling method used was not clear.

   C. the sampling method used was convenience sampling

   D. the sampling method used was voluntary sampling.

   E. the sampling method used was cluster sampling.

   F. the sampling method used was stratified sampling

f) is the sampling method used random?

   A. The sampling method used is random.

   B. the sampling method used is not random.

   C. Since the method was not clear, it is not known if the sampling was random.

g) what type if bias is evident in this sample

   A. none

   B. undercoverage and response bias

   C. not clear; it is not known if the samples were randomly chosen

   D. Response bias

   E. Voluntary response bias

h) what problems can you see in generalizing the population of interest?

   A. the question itself is related to those who respond.

   B. Those who respond may have strong feelings one way or another.

   C. none

Solution

answers

1>> b    this includes defining the population from which our sample is drawn

2>>b   

3>>b

4>>a

5>>c   is a type of nonprobability sampling which involves the sample being drawn from that part of the population which is close to hand. That is, a population is selected because it is readily available and convenient.

6>>a

7>>e

8>>a