total area under curve is equal to one, no negative values, represents a probability function

likihood thatthe true population parameter lies outside the confidence interval (1-confidence level)

tendency of measurement proces to be an incorrect estimator of a parameter

min, Q1, median, Q3, max

conclusion about the population based on many random samplings

probability of each value of a random variable

qualitative variables; take on names that are names or labels

study that obtains data from every member of a population

sampling distribution of any statistic will be normal or close to normal, if the sample size is large enough

r^2; proportion of the variance inthe dependent variable that is predictable from the independent variable

Q3-Q1; measure of variability

used to express degree of encertainty associated with a sample statistic; interval estimate combined with a probability statement

occurs when experimental controls do not allow the experimenter to reasonably eliminate plausible alternative explainations for an observed relationship between independent and dep

variable that can take on any value between two specified values; opposite of discrete

group that receives no treatment or a neutral treatment

measures the strangth of the association between two variables

factor used to compute the margin of error (t-score, z-score, etc.)

percentages corresponding to the area under a normal curve within each standard deviation

variable that can only take on whole number values

events that cannot occur simultaneously

Definition

Term

subjects are matched according to a variable the experimenter wishes to control

subjects and analysts do not know who received the placebo and who did not

controlled study in which the researcher attempts to understand cause and effect relationships

point with such an extreme value that it greatly affects the slope of the regression line

distribution that deals with the number of successes within a set number of trials

distribution that deals with the number of trials required for a single success

x axis is quantitative variable, y axis is size of group

occurence of one event does not effect the probability of another

determined by n choose r

estimate or infer on the basis of certain variables within the known range

replacement of the y variable with log(y) in order to make the relationship linear

probability that an event will not occur

relative frequency an event will convere on theprobability of the event as the number of trials increases

method of determining the curve that best describes the relationship between expected and observed sets of data by

change to a variable charcterized by an operation--adding/subtracting a constant, multiplying/dividing by a constant

calculator command to determine z-score

extraneous variables that serve as an explaination for the observed relationship between the independent and dependent variables

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