Question 1

If we were making inferences from a single sample,we would expect that there would be a ____ percent probability that the sample mean or proportion generated from our sample results would be within two standard errors of the true population mean.

Accepted Answer

A)  68.26%
B)  99.74%
C)  97.5%
D)  95.44%
E)  98.00%

Question 2

A researcher is conferring with a client to do a telephone interview for a particular topic,which the researcher will subcontract to a field services firm for $10 per usable response.The researcher's client wants to be 95.44% confident of the results.Assume the sample proportions formula is appropriate,and that the level of tolerable sample error is 4%.The budget for data collection only offered by the client can be up to but not over $10,000.How many usable responses are needed for the given level of confidence and much will the subcontractor charge the market researcher for sampling? Is the budget for data collection large enough?

Accepted Answer

1)Sample proportions formula is appropri...

Question 3

Which of the following is not a method for estimating the population standard deviation?

Accepted Answer

A)  prior study results
B)  conduct a pilot study
C)  use secondary data
D)  using population size

Question 4

A normal distribution has a total of 6 standard deviations.

Accepted Answer

A) True 
 B)False

Question 5

If a researcher takes enough samples,the data will begin to approach a normal distribution.

Accepted Answer

A) True 
 B)False

Question 6

When a research company routinely uses samples of 300 for their studies,they are using which type of plan to determine sample size?

Accepted Answer

A)  the 50% rule
B)  budget available
C)  rule of thumb
D)  number of subgroups to be analyzed

Question 7

When a researcher is not sure if people who responded to the survey are different from those who did not respond,this brings into question the issue of:

Accepted Answer

A)  inappropriate sample size.
B)  systematic bias.
C)  nonresponse bias.
D)  refusal bias.

Exam 14: A: Sample Size Determination

Correct Answer
verified
1)Sample proportions formula is appropri...
View Answer

If a researcher takes enough samples,the data will begin to approach a normal distribution.

Correct Answer
verified

Which of the following is not a method for estimating the population standard deviation?

Correct Answer
verified

A normal distribution has a total of 6 standard deviations.

Correct Answer
verified

When a research company routinely uses samples of 300 for their studies,they are using which type of plan to determine sample size?

Correct Answer
verified

When a researcher is not sure if people who responded to the survey are different from those who did not respond,this brings into question the issue of:

Correct Answer
verified

If we were making inferences from a single sample,we would expect that there would be a ____ percent probability that the sample mean or proportion generated from our sample results would be within two standard errors of the true population mean.

Correct Answer
verified

Exam 14: A: Sample Size Determination

Correct Answerverified1)Sample proportions formula is appropri...View AnswerShow Answer

If a researcher takes enough samples,the data will begin to approach a normal distribution.

Correct AnswerverifiedShow Answer

Which of the following is not a method for estimating the population standard deviation?

Correct AnswerverifiedShow Answer

A normal distribution has a total of 6 standard deviations.

Correct AnswerverifiedShow Answer

When a research company routinely uses samples of 300 for their studies,they are using which type of plan to determine sample size?

Correct AnswerverifiedShow Answer

When a researcher is not sure if people who responded to the survey are different from those who did not respond,this brings into question the issue of:

Correct AnswerverifiedShow Answer

If we were making inferences from a single sample,we would expect that there would be a ____ percent probability that the sample mean or proportion generated from our sample results would be within two standard errors of the true population mean.

Correct AnswerverifiedShow Answer

Correct Answer
verified
1)Sample proportions formula is appropri...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified