SOCS
What does SOCS stand for?
Shape, Outliers, Center, Spread
What does FUDS stand for?
form, unusual features, direction, strength
What is the Multiplication Rule?
P(A and B) = P(A) * P(B|A)
What are the 4 conditions of a binomial test?
success or fail, independence, fixed probablility, fixed trials
What are the 3 conditions needed for all tests?
What measure of center is connected to standard deviation?
mean
How do you interpret the y-intercept?
When the explanatory variable is 0, the response variable will be "y-intercept".
What does it mean when two events are independent?
How do you solve this 4!?
4! = 4*3*2*1 = 24
How do you interpret a confidence interval?
We are C% confident that the interval from __ to __ captures the [parameter in context].
How do you prove a believed outlier is an outlier?
The 1.5 IQR rule
What are three things the r value communicates?
direction of slope, linear or not, and strength
What is the General Addition Rule?
P(A or B) = P(A) + P(B) - P(A and B)
How do you find the mean of a binomial distribution?
np or (number of trails)(probability of success)
What is the rule for independence? What does it mean?
The 10% rule - Our sample can't be more than 10% of our population.
What does standard deviation tell us?
The average distance of all the point from the mean.
For every 1 increase in the explanatory variable, the response variable will go up/down by "slope".
How do you find the expected value?
E(x) = x1*P(x1) + x2*P(x2) + x3*P(x3) + ...
How do you find the mean of a geometric distribution?
1/p or 1 divied by the probability of success
What is the margin of error?
What are the 4 types of measures of spread?
standard deviation, variance (SD2), IQR, and range
What does r2 tell us?
How much of the response variable can be explained (caused) by the explanatory variable. It is the Coefficient of Determination.
What does it mean for events to be mutually exclusive?
They can NOT happen at the same time.
Ex/ Having blue eyes and having brown eyes. (you can't have both)
What must you change if x > or = or x >?
1-binomcdf
What are type 1 and type 2 errors? Describe both.
Type 1 - When HO is rejected, but HO is actually true
Type 2 - When you fail to reject HO, but HA is true