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HDFS 350 Final Exam Questions and Answers
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HDFS 350 Final Exam Questions and Answers
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HDFS 350 Final Exam Questions andAnswers
Inferential Statistics - Answer-Allows researchers to make inferences about the true
relationships between variables in populations based on a sample of data from that
population. Take into account random error/chance.
Descriptive Statistics - Answer-Just describes the distribution of data in your sample. No
inference about anyone other than those you studied.
Null hypothesis - Answer-what is tested: any association or difference between
variables in population
Association Question - Answer-No systematic relationship between variables in
population.
Differences Question - Answer-No difference between the means in the population
Type 1 error - Answer-Came to conclusion but that conclusion was not true. Chance
results.
Type 2 error - Answer-Say nothing happened when something did happen. Results
NOT due to chance.
The research hypothesis - Answer-predictive statement. Must be based on existing
research/theory.
Statistical significance - Answer-If probability is less than alpha (usually .05), then it is
statistically significant. So you reject the null hypothesis. Due to chance.
Cross-Sequential Study - Answer-Multiple groups studied over an extended period of
time assessed multiple times.
Cross-Sectional Study - Answer-Multiple groups studied at a single point in time.
Effect size - Answer-The strength of the relationship between the independent and
dependent variable.
Association Statistics - Answer-Tells you if there is a relationship between two variables.
Associate or relate two or more variables.
Pearson correlation - Answer-Both variables are normal/scale. Normally distributed.
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