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Descriptive Statistics
Probability
Statistical Inference
Linear Regression
Anything
100
interval: mean, median, mode, standard deviation, IQR, histogram/density(if not discrete) ordinal/nominal: proportion/frequency tables, barplot
What are the appropriate statistics to compute to describe interval, ordinal, and nominal variables? What are the appropriate graphs to plot to describe these variables?
100
joint different conditions
What is the difference between conditional probability and joint probability? Explain the differences among the following three tables. table1 <- prop.table(table(gender, education)) table2 <- prop.table(table(gender, education),1) table3 <- prop.table(table(gender, education),2)
100
sampling is....
What is the difference among the following three distributions, sample distribution, sampling distribution, and population distribution?
100
interval: ordering and distance ordinal: ordering, no quantifiable distance nominal: no ordering, no distance
What is interval, ordinal, and nominal variables
200
two categorical variables: two-way frequency or proportion tables, side-by-side barplots two continuous variables: correlation/covariance (if linear), scatterplot one categorical and one continuous variable: side-by-side scatterplot
What are appropriate statistics to compute to describe the associations between two categorical variables, two continuous variables, and one categorical variable and one continuous variable and what are the appropriate graphs to plot to describe these associations?
200
P(AUB) = P(A)+P(B)-P(A intersect B) P(A intersect B) = P(A)*P(B|A) or P(B)*(PA|B)
What is the assumption of P(AUB) = P(A)+P(B)? What is the equation for P(AUB) when the assumption is NOT true? What is the assumption of P(A intersect B) = P(A)*P(B)? What is the equation P(A intersect B) when assumption is NOT true.
200
standard error is the standard deviation of the sampling distribution sample standard deviation, denominator is n-1 standard error = population standard deviation / sqrt of sample size, we approximate population standard deviation using sample standard deviation
What is the difference/similarity between standard deviation and standard error? What is the association between sample standard deviation, standard error, and population standard deviation?
200
central limit theorem
What is CLT? Explain it in full.
300
# of standard deviations x is from its mean standard normal, mean 0, standard deviation 1
What is z-score? What does it mean? How to calculate it? What is the probability distribution of z-scores? What is the name of that distribution? What is its mean and standard deviation?
300
one uses sample proportion one uses hypothesized proportion
What is the standard error needed to calculate confidence interval for a proportion. What is the standard error needed to calculate test statistic for a significance test on a proportion? Why they are different?
400
t-tests
find a question on t-tests
500
find a really hard interpretation question
find a really hard interpretation question
500
find a hard interpretation question on regression
find a hard interpretation question on regression