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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 type of significance test used for the mean of a single population when the standard deviation of the population is unknown.
What is a T test (or T procedure)?
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

An inactive (fake) treatment to which some subjects may actually respond.

What is a placebo?

200

The interpretation of the expected value, E(X), of the random variable X=amount won when playing roulette. 

What is the expected average winnings over many plays of the game roulette?

200

The conditions to use this test include all expected counts be greater than or equal than 5.

What is the goodness of fit (or chi-square) test?

300

This calculator command can be used to find the area under a normal distribution and above an interval.

What is normalcdf?

300

A point which changes the slope of a LSRL.

What is an influential point?

300

Researchers divide a population into small heterogeneous groups. They then randomly select a few of these smaller groups and select every unit in the groups to form a sample.

What is cluster sampling?

300

Events A & B such that P(A|B) = P(A)

What are independent events?

300

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 np & n(1 - p) be greater than or equal to 10 (or 5)? (SRS could also be one of the two)

400

This rule states the expected number of observations within each interval for a normal distribution.

What is the 68-95-99.7 rule?

400
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)?
400
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?
400

The condition involving the population size that must be satisfied to use σ/√n as the standard deviation of a sampling distribution.

What is 'the population is at least 10 times the sample size'?

400

The formula to calculate the z statistic for a one-sample test for population proportion.

What is z = (p̂ minus p) divided by sqrt(pq/n) ?

500

The square of the standard deviation.

What is the variance?

500

Linear, Indepedent, Normal distribution of residuals, Equal variance of residuals, and Random

What are the assumptions for a linear regression t-test?

500

A confounding variable.

What is a variable that is related to both the explanatory and response variables?

500

The formula to determine the variance for a combination of 3 independent random variables: X1, X2, and X3

What is σ2=(σ1^2+σ2^2+σ3^2)?

500
b +/- t*SE sub b
What is the confidence interval for slope beta of a true regression line?