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- How much area of the normal curve falls between –1.96sd and +1.96sd?
- 95%
- what is an index
- A multiple item measure used to assess magnitude of knowledge
- After you have tested a new scale what do you do?
- fix any problems and test it again
- what is a scale?
- A multiple item measure usually used to assess attitude, opinion or image
- Why are some scale items positive and some negative?
- to prevent response bias
- In order to put verbatim responses into categories, what process should you follow?
- Have at least two coders put responses into categories and check for disagreement between the coders
- multi stage sampling is...
- Sampling groups from one frame then sampling from those groups, such as sampling 5 zip codes from a city, then sampling addresses from those 5 zip-codes
- what is the normal curve
- The probability distribution of equally likely events
- Which of the following is true about the selection of sample sizes?
- To cut sampling error in half you must quadruple the sample size
- The area under the normal curve between –1.96sd and + 1.96sd is important to social scientists. Why?
- It corresponds to being 95% confident that estimates from sample-based studies are accurate
- Which of the following is true about sample size?
- All the above
- Why is it important to have interviewer instructions?
- To make sure bias is reduced by standardizing how the questions are asked
- What basic analysis can you do in a spreadsheet?
- percentage, average, median
- Which of the following can affect internal validity?
- regression, testing, history
- why use a sample?
- It is more time and cost effective than a census for large populations
- if you use volunteers what do you need to bear in mind?
- That their answers cannot be generalized to a population
- significance tells you...
- The probability that there is a relation between two variables
- What significance test is used if one variable is interval level of measurement and the other variable is ratio level?
- t-test for correlation