One-Variable Data
The appropriate measure of center and spread used for a distribution that is skewed to the left.
What is median and IQR?
observed y - predicted y
What is the residual?
This phrase is used to describe an observed effect so large that it would rarely occur by chance.
What is statistically significant?
This type of random variable requires a fixed number of trials.
What is a binomial random variable?
The THREE conditions that must be satisfied in order to perform an inference procedure.
What are the random condition, 10% condition (independence), and the Large Counts condition?
When comparing distributions, always include these FOUR characteristics.
What are shape, center, spread (variability), and any unusual features (outliers / gaps)?
The sampling method that requires dividing the population into groups, then randomly selecting groups to be a part of the sample.
What is Cluster Sampling?
The type of variable where the probability distribution assigns probability as the area under the density curve.
What is a continuous random variable?
The probability of a sample result, or more extreme, happening, assuming the null hypothesis is true.
What is a p-value?
The fraction of variation in y that is explained by x using the LSRL.
What is the coefficient of determination r2?
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?
Events that have no outcomes in common and can never occur simultaneously.
What are mutually exclusive events (or disjoint events)?
The critical value for estimating a population mean with 90% confidence using a sample size of 53.
What is t*=1.675?
Measures the average difference between the predicted data and the actual data
What is the expected error se (or standard deviation of the residuals)?
The FOUR principles of experimental design.
What are compare, control, randomize, and replicate?
Calculator program that calculates a single probability when determining the number of trials it takes to get a success.
What is geometpdf?
Two ways you can reduce the margin of error in a confidence interval.
What are reduce the confidence level and increase the sample size?
Term used for Cumulative Relative Frequency.
What is Percentile?
Two of the methods used for determining whether a LSRL is a good model for predicting data.
What are a high coefficient of determination r2, no obvious pattern in the residual plot, and low expected error se.
Unexpected factors which could possibly influence the results of a study or experiment.
What are confounding variables?
Method used to determine if events are independent.
What is P(A|B) = P(A)?
Inference procedure used for a distribution of proportions do determine whether there is an association between two variables.
What is Chi-Square Test for Independence?