General Statistics
What do you call someone who studies statistics?
Statistician
How many groups are in a t-test?
2
What should you do if your ANOVA is significant?
Run post hoc tests
What makes a regression different from a correlation?
Directional/predictive relationship
What graph shows us distributions?
Histograms
What are the four levels of measurement?
Nominal, ordinal, interval, ratio
What is the difference between independent samples and paired samples?
Independent samples are two different groups of people, paired samples are the same people tested two times.
What kind of variables do ANOVAs require for the IV and DV? (continuous, categorical, one of each, etc.)
Continuous DV and Categorical IVs
What makes a regression different from an ANOVA?
What graph should you use for a correlation or regression?
scatter plot w/ line of best fit
What is sampling bias?
What is the test statistic for a t-test?
t
What does ANOVA stand for?
Analysis of variance
What is the test statistic for regressions?
Beta and F
What graph should you use for ANOVAs
Boxplot
What is the population symbol and the sample symbol for mean?
Population symbol = mu, sample symbol = x bar (or m)
What is the effect size for a t-test?
Cohen's d
what are the two kinds of post hoc tests we talk about in this class?
Tukey and Bonferroni
What is the effect size for regressions?
R squared
When should you use a pie chart?
for categorical variables only
What is the difference between descriptive statistics and inferential statistics?
Descriptive statistics tell us characterisitcs of our sample (mean, standard deviation, etc.), inferential statistics include various analyses of our sample (t-test, ANOVA, etc.)
What can you conclude if p = .03, t = 22.5, and cohen's d = .48?
Group one's mean is significantly larger than group two by 22.5, and the effect size is very large, meaning high practical significance.
What are between groups, within groups, and total degrees of freedom for ANOVAs?
k - 1 (between groups) N - k (within groups), N - 1 (total)
What can you conclude if your regression output is B = 2.34, p = .078, F = 1.23, r squared = .01
No significant findings, small effect size
What are the mean, median, mode, and SD for a normally distributed historgram?
0, 0, 0, and 1