Reference no: EM13948373
A. Design effects are used to evaluate the precision of statistics for different sample design.
Is the design effect of a clustered element sample likely to be larger or smaller than one?
Is the design effect of a stratified element sample likely to be larger or smaller than one?
In a single stage clustered sample, if within a cluster a variable has nearly the same value for all elements within the cluster, what value will the intraclass correlation be close to?
For a single-stage clustered sample, the intraclass correlation for a key variable is 0.016 and the cluster size is 10. Calculate the design effect for the mean of that key variable.
What does the design effect in part 4 mean?
B. A medical practice has record for N=900 patients. A simple random sample of n=300 was selected, and 210 of the sample patients had private health insurance.
1. Estimate the percentage of patients with private health insurance and the standard error of this estimate.
2. Calculate a 95% confidence interval for the population percentage.
3. The study is to be repeated in another medical practice that has N=1000 patients. A standard error of 2.5 percentage points for the sample percentage of patients with private health insurance is required. What sample size is needed for a simple random sample to achieve this level of precision? For planning purposes, assume that the population percentage is 50%.
C. A two-stage cluster sample of n=1200 in a=60 clusters is selected from a large population with S^2=500. In a published report, v(y ¯)=9 is reported. A colleague says there is no error in the calculation of the variance of the mean. Do you agree? Show a numeric justification for your answer. (Hint: What is the value of roh implied by this reported variance?)
|
Reflectivity of light at normal incidence
: It is desired that the reflectivity of light at normal incidence to the surface of a trans- parent medium be less than 5.0%. Which of the following materials in Table 21.1 are likely candidates: soda-lime glass, Pyrex glass, periclase, spinel, pol..
|
|
Complete a job requirements job analysis
: Complete a job requirements job analysis on a position with which you are familiar. Focus on the specifics tasks of the associated KSAOs that lead to success in meeting the tasks. (showing detail both in the tasks and the KSAOs type, proficiency, et..
|
|
Create table command, and modify it to create a new table
: Start with this CREATE TABLE command, and modify it to create a new range_partitioned table named CH07EMPLOYEE_RANGE that contains the same column as the employee table.
|
|
Business requirements and design requirements
: Why is it important to use modular approach for designing Networks? Could you anticipate what problems can occur if such methods are not used? Describe your response in two paragraphs.
|
|
Calculate design effect for the mean of that key variable
: A medical practice has record for N=900 patients. A simple random sample of n=300 was selected, and 210 of the sample patients had private health insurance. Estimate the percentage of patients with private health insurance and the standard error of..
|
|
Create an e-r diagram of entities, attributes & relationship
: Using the script file below to create an E-R diagram of the entities, attributes and relationship.
|
|
What should yahoo do about the situation in laffaire yahoo
: In your opinion, what should Yahoo do about the situation in L'Affaire Yahoo? Should it make concessions to the French government
|
|
Calculate the margin and turnover ratios for last year
: Seere Company provided the following income statement for last year. Compute average operating assets. Compute the margin and turnover ratios for last year. Compute ROI.
|
|
How world you compare with nike
: What are the pros, cons and risks associated with Nike's core marketing strategy? If you were Adidas, how world you compare with Nike
|