Organizing Data
Data Relationships
Producing Data & Experiments
Probability & Distributions
Inference & Tests
100
This measure of center is more resistant to outliers than the mean.
What is the median?
100
observed y - predicted y
What is the residual?
100

This phrase is used to describe an observed effect so large that it would rarely occur by chance.

What is statistically significant?

100
This type of random variable requires a fixed number of trials.
What is a binomial random variable?
100

The probability of correctly rejecting the H0.

What is the Power of a test?

200
To calculate, subtract the mean of the distribution from the observed x, then divide by the standard deviation.
What is the z-score (or standardized value)?
200
Measures the direction and strength of a linear relationship between two quantitative variables.
What is correlation (or r)?
200

The only way to show cause-and-effect.

What is a well-designed, well-controlled experiment?

200
The type of variable where the probability distribution assigns probability as the area under the density curve above a specific interval.
What is a continuous random variable?
200

Sum((Obs-Exp)2/Exp)

What is chi-squared test statistic?

300
This rule helps to determine if data is normally distributed by checking the number of observations within each interval.
What is the 68-95-99.7 rule?
300
The fraction of the variables in the values of y that is explained by the LSR of y on x.
What is the coefficient of determination (or r squared)?
300
This experimental design involves the random assignment of units to treatments which are carried out separately within each group of units known to be similar in some way that is expected to affect the responses.
What is block design?
300
Events that have no outcomes in common and can never occur simultaneously, for which the addition rule is used.
What are disjoint events (or mutually exclusive events)?
300
The conditions to use this test include all expected counts be greater than or equal to 1 and no more than 20% of all the expected counts be less than 5.
What is the goodness of fit (or chi-square) test?
400
The square of the standard deviation.
What is the variance?
400

FUDS

What is the acronym used to describe a scatterplot's Form, Unusual Values, Direction, and Strength?

400
The 3 basic principles of experimental design.
What are control, randomize, and replicate?
400
The condition involving the population size that must be satisfied to use sigma divided by the square root of n as the standard deviation of a sampling distribution.
What is 'the population is at least 10 times the sample size'?
400
Two of the conditions to be verified for inference about a proportion.
What are the population size be greater than or equal to 10n and n times p hat & n times (1 - p hat) be greater than or equal to 10? (SRS could also be one of the two)
500
This calculator command can be used to find the area under a normal distribution and above an interval.
What is normalcdf?
500

The use of a regression line for predictions far outside the interval of values of the explanatory variable used to construct the line.

What is Extrapolation?

500

This type of sampling divides the population into homogeneous groups.

What is Stratified Random Sampling?

500

Doing this changes the measures of center and location (min, max, percentiles, etc.) but not measures of spread.

What happens when a constant is added or subtracted to random variable?

500

x-bar +/- t*SE 

What is the confidence interval for means?

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