1. When you follow the scientific method, which step would occur after testing the hypotheses through experimentation?
- Communicate the results of the process.
- Analyze data from an experiment to draw a conclusion.
- Ask a question about an observation.
- Perform research.
2. What is the most commonly used statistical method for analyzing data?
- regression analysis
- mean estimation
- mean analysis
- sample proportion
3. If the results of a study do not align with previous studies, what question should an evaluator ask?
- Are there any experts that disagree with the findings?
- Who paid for the research study?
- Can the study be replicated to verify the findings?
- Did the study have an appropriate sample size?
4. In a linear regression, which variable is also known as the target or response variable?
5. When a number of items are grouped together, which type of machine learning algorithm can determine which items in the group predict the presence of other items?
6. What is the goal of linear regression?
- to compute a line the interpolates the data, and which can be expressed as a weighted average of the predictor variables and any other function
- to provide a formula that does not require validation
- to provide a summary of the data
- to construct a flow chart
7. What are two types of supervised machine learning algorithms? (Choose two.)
8. What type of error has occurred when a data scientist records a measurement incorrectly after viewing the correct value on the measuring device?
9. Which type of regression analysis is often used to model variables that have an exponential relationship?
10. Which type of information can distort the results of an analysis and careful consideration should be given to their removal from a data set?
- units of measurement
11. When is an experiment considered reliable?
- if someone else can modify the experiment and achieve the same conclusions
- if someone else can modify the experiment and achieve similar conclusions
- if someone else can repeat the experiment and find the same conclusion
- if someone else can repeat the experiment and find different conclusions
12. Refer to the exhibit. What is the purpose of the blue sphere?
- to display the mean
- to indicate data clusters
- to measure true error
- to categorize historical data
13. A researcher has measured the reliability of a test using the parallel-forms method. What is the expected result of this measurement?
- How similar are the scores of two different tests that are created from the same content domain?
- What is the variation of scores for different items in the same test?
- How much variation exists between scores for the same person taking a test multiple times?
- How similarly do different people score on the same test?
14. Which type of machine learning algorithm uses data sets verified by experts as its learning basis?
15. Which type of reliability would a scientist measure if the scientist wants to examine the variation between exam scores for a person taking a single test multiple times?
- internal consistency