Exam 3 Review Session Flashcards
(10 cards)
1
Q
hypothesis testing, 4 step process
A
- state a hypothesis about the population
- use hypothesis to describe expected values from the mean
- obtain a random sample from the population
- compare the obtain sample data with the prediction that was made from the hypothesis
2
Q
if p-value is less than the significance level, we…
A
reject the null hypothesis
3
Q
alternate hypothesis
A
real difference between groups
4
Q
Type I Error
A
researcher concludes that a treatment has an effect when it has none
5
Q
Type II Error
A
researcher has failed to detect a real treatment effect
6
Q
alpha level
A
the probability that a test will lead to a type 1 error
7
Q
statistical power
A
the probability that a test will correctly reject a false null hypothesis
8
Q
anova
A
a statistic to help us compare more than 2 means
9
Q
key assumptions in anova
A
data is independent, data fits a normal curve, populations have equal variances
10
Q
two-factor anova
A
helps us compare 2 or more means
