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 =
QUESTION PART A: 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 90% confident that you esimate is within 0.5% 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. QUESTION PART B: You want to obtain a sample to...
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 =
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 wish to test Ho:μ1=μ2 versus Ha:μ1≠μ2 at α=0.05 You obtain a sample of size n1=8 with a mean of ¯x1=88.4 and a standard deviation of s1=10.3 from the first population. You obtain a sample of size n2=9 with a mean of ¯x2=98.2 and a standard deviation of s2=5.5 from the second population. Assume that the populations are normal with equal variances. Do not round interim calculations. Round your final answers to three decimal places. (a). Find the test statistic: ...