Descriptive stats
__________ measures the average distance of data from the mean.
What is Standard deviation
What is the probability of something not happening also called?
What is the complement
A symmetric, bell shaped distribution
What is a normal distribution
The value measuring strength and direction of linear association
What is correlation coefficient (r)
Every member of the population has an equal chance in this sample
What is a simple random sample
What is the median
Two events with no outcomes in common
What are Mutually exclusive events
What is the name of the rule that states about 68% of data lies within 1 standard deviation of the mean?
What is the Empirical Rule
The equation y=a+bx is called _____
What is the regression line
The variability purposely changed by researchers
What is the explanatory variable
What does Q3-Q1 equal?
What is the Interquartile range
P(A and B) for independent events equals this formula
What is P(A) x P(B)
This score measures how many standard deviations from the mean.
What is the z-score
what is the predicted y
A factor that may affect the response but isn't studied directly
What is a lurking variable
_______ is a graph to display the distribution of quantitative data
What is a histogram
What is 1
A distribution skewed right has a long tail going what direction?
What is the right side
A residual plot helps check this relationship type
What is linearity
Using chance to assign subjects to treatments
What is random assignment
A data point far from the rest of the data
What is an Outlier
A simulation often uses this particular sequence to essentially mimic chance.
What are random numbers
This mean and standard deviation of a sampling distribution of x bar depend on these
What are the population mean and sample size
Correlation does not imply this
What is causation
A study observing individuals without actually imposing treatments
What is an observational study