Vocabulary
What is the default assumption that there is no significant difference between the groups being compared?
Null hypothesis
A description of a statistic that did not result by chance
What is statistically significant?
A hypothesis that all differences between groups are due to chance
What is a Null Hypothesis?
What is the hypothesis that suggests there is a significant difference between the two groups?
Alternative Hypothesis
What are the initials to remember which conditions to check?
IRTL
A hypothesis that differences between conditions are not due to chance
What is an alternative hypothesis?
What is the probability of obtaining a test statistic at least as extreme as the one computed from your sample data, assuming that the null hypothesis is true?
P-value
In checking conditions, what does T stand for?
10% Rule: n<10% of the population
An inferential statistical test used to evaluate the difference between the means of two groups
what is a t-test?
What is a study design where two related observations or measurements are compared?
Matched pairs
When checking conditions, if we do not know the shape of the population, what is the minimum n should be?
30
the criteria for deciding whether the obtained p-value is low enough to reject the null hypothesis
what is the alpha?
What is the standard deviation of our sample calculated using our sample mean
Standard Error
What tells us that if the population is Normal, then the sampling distribution is approximately normal?
Central Limit Theorem
Using the degrees of freedom formula for a one-sample t-test, this is the degrees of freedom for a sample of 10 people.
What is 9?