GCU HLT362 Week 3 Quiz 2 Latest 2019

1 If you are conducting a study on the impacts of diet and exercise on high blood pressure and you take a proportional sample based upon race/ethnicity, this would be an example of:

•Simple random sample

•Cluster sampling

•Stratified sampling

•Convenience sampling

2 A Type II error is committed when:

•We reject a null hypothesis that is true.

•We do not reject a null hypothesis that is false.

•We do not reject a null hypothesis that is true.

•We reject a null hypothesis that is false.

3 In a research study, if the sample size is too low and the results do not find a statistical difference when in fact there is a difference, this is referred to as:

•Validity

•Reliability

•Type I error

•Type II error

4 Which of the following can be reduced by proper interviewer training?

• Neither sampling error nor measurement error

• Sampling error

• Both sampling error and measurement error

• Measurement error

5 To obtain a sample of 20 patients in ICU, clinician goes to the ICU and selects the current patients. This is an example of a:

• Judgement sampling

•Simple random sampling

•Snowball sampling

• Convenience sampling

6 Scenario Based Question: If you were conducting a study of blood pressure readings in a hospital unit, compared AM and PM readings, and assumed the data were normally distributed and variances were equal, what type of statistical test would be conducted?

• Separate variance t-test

• Paired t-test

• Pooled variance t-test

• F-test