first blank: sampling frame ( list of population unit from which sample is to be selected)
second blank: equi-probability
(if there is choice for the blank , please share so that appropriate words/phrase can be used)
You must have a as aordered list to obtain a systematic sample with high external validity...
You must have a as a randomly ordered list to obtain asample with high external validity (e.g., representative of the population). Fill in the first blank: Fill in the second blank:
. Systematic Sample Example: You are conducting a survey of students in a co-ed dormitory in which males are assigned to odd-numbered rooms and females are assigned to even-numbered rooms. Can you obtain a representative sample when you choose every 10th room? Solution . Cluster Sample Example: You want to know the mean price of gasoline at gas stations located within a mile of rental car locations at airports. Explain how you might use cluster sampling in this case. Solution:
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 98% confident that you estimate is within 2% of the true population proportion. How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 90% confident that you estimate is within 2.5% of the true population proportion. How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 95% confident that you estimate is within 1.5% of the true population proportion. How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 99% confident that you estimate is within 3% of the true population proportion. How large of a sample size is required? n =
20. In systematic sampling, every kth case is selected from a list. If you are conducting a study in which you want a sample of 500 participants and you have a list of 15,000 people as possible participants, what would be your sampling interval? You would choose: A. every 15th person B. every 30th person C. every 50th person D. every 100th person
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 99% confident that your esimate is within 1% of the true population proportion. How large of a sample size is required? n =
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 99% confident that you estimate is within 2% of the true population proportion. How large of a sample size is required? Hint: Textbook Video [+] N-
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 95% confident that you esimate is within 4% of the true population proportion. How large of a sample size is required? n=? Do not round mid-calculation. However, use a critical value accurate to three decimal places.