e Colorado State Legislature wants to estimate the length of time it takes a resident of Colorado to earn a Bachelor's degree from a state college or university. A random sample of 265 recent in-state graduates was surveyed. a. Identify the variable of interest. b. Is the variable quantitative or qualitative (numerical or categorical)? c. What is the implied population?
Simple random: Generating an interview list using a random number generator
Stratified: randomly picking 2 employees from each of the departments/floors at the hospital.
Cluster: randomly picking 3 departments/floors and using all the employees from those areas
Systematic: walking down the halls and picking the employee in every-other room
For example: Convenience: picking the first 10 employees to walk into the hospital.
The convenience method is the least successful method of selecting a proper sample for a statistical study. However, in this situation we can say that using this method would allow us to complete our study quickly. A negative effect of using this method could be extreme bias of the responses. The first ten employees to enter the hospital may all be excited to get to their jobs and therefore have a high satisfaction level. Also, employees entering together may work in the same area of the hospital, therefore limiting the scope of the results to just one area instead of the whole facility.
5.The Colorado State Legislature wants to estimate the length of time it takes a resident of Colorado to earn a Bachelor's degree from a state college or university. A random sample of 265 recent in-state graduates was surveyed.
- a. Identify the variable of interest.
- b. Is the variable quantitative or qualitative (numerical or categorical)?
- c. What is the implied population?
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