HPHY 212 Final Review Questions with Complete Solutions You want to know how good a test is at correctly indentifying if a woman is NOT pregnant. What test woud you want to run and what is the formula? - Correct Answers ✅Specificity describes how good a test is at correctly identifying an individual as not having a condition; propotion of people without condition that test negative
-Formula: true negative/(false positive+true negative)
What is the difference between an ANOVA test and a t-test? -
Correct Answers ✅-t-test: tests significant difference
between 2 groups. it can be paired or un-paired. a t-test will compute a t-statistic that can be compared to a critical value
to determine whether or not to reject the null hypothesis (ex:
brain sizes between treatment and no treatment groups)
-ANOVA: tests significant difference between 3 or more
groups. here, we compute a f-statistic and compare it to an f- critical value. a post hoc test is required to determine which
means are different (ex: brain size between three treatment
groups and one no treatment group) How does a meta-analysis differ from a systematic review? - Correct Answers ✅A meta-analysis has new statistical analysis. Both are high levels of evidence and require a plan for reviewing the literature, but only a meta-analysis conducts new statistical analyses A group of people are asked to take a couple of tests. For one of the tests, they're not allowed to study, and for the next 1 / 2
HPHY 212 Final Review Questions with Complete Solutions exam they are allowed to study a day before the exam. The results came back where they performed better if they studied vs. if they didn't study. What kind of test did the experimenters perform? - Correct Answers ✅Paired t-test, the same subjects were meausred twice Write the null hypothesis and alternative hypothesis for the
following: heart rate and physical activity - Correct Answers
✅H0: Physical activity has no effect on heart rate.
Ha: Heart rate increases as physical activity increases.
What is the formula for fidning the standard error of the mean, and what z-score represents a CI range of 95%? - Correct Answers ✅Standard error of the mean (SEM) = s/sqrt(n)
z-score for CI range of 95%: 1.960
A given data set demonstrates a p-value of 0.062. What are the possible interpretations, assuming an alpha value of 0.05? - Correct Answers ✅Accept Null (p > alpha-level) or Type II error What percentage of a standard distribution is within one standard deviation of the mean? - Correct Answers ✅68%
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