Probability
What is the procedure which gives the probability of successes until one failure
geometric
What variable measures how many SD's away from the mean a data value is on a normal curve.
z
A gallery owner is interested in how much more likely a print in the front of the gallery will be purchased compared to a print at the back of the gallery. The print is rotated over the course of a year and data is collected
one sample t test for population mean
What are the two parts of the independence condition
random
10%
What way to find the center point of a data set using the middle value
median
what is the procedure that gives the probability of a particular amount of successes given a set number of trials and set success rate
binomial
what type of curve is used for means
t-curve
Are the majority of community college students in college in order to better their careers. 75 students were surveyed.
One-sample t test for population proportion
What conditions needs to be satisfied for a 1 sample t test for mean
10% condition
Random
Central Limit Theorem
What is the 5 things you need to cover to describe distribution
Context
Center
Shape
Variability
Unusual Features
What conditions are needed for Binomial
Set number of trial
same probability of success
each trial success is independent
Each trial is success for Failure
What type of curve is created from X2
chi squared curve
Is the first born puppy larger than the last born puppy? 450 litters were investigated.
One sample paired t-test for population mean
What are the conditions needed for a chi squared test for association
10% condition
Random
Large Counts (At least 5 expected counts)
How do you find expected values on a X2 test for homogeneity
(Row total)(Column Total)/Table Total
What is the equation of calculating the probability you will have more than 5 successes out of ten trials at .36 chance of success.
1-binomcdf (x=4, p=.36, n=10)
What do you have to do the a p-value when doing a two sided test
multiply by 2
Samples were taken from various distances from a chemical spill and toxicity was reported. Determine if there is a relationship between toxicity and distance from the spill.
One sample t test for linear regression
What are the 5 conditions of a one sample t test for linear regression
Linear
Independent
Normal
Equal SD
Random
Identify the sampling method
Select a random participant from 1-9, then take every fourth participate and survey them.
systematic random sample
How do you add together two probabilities?
P(a)+P(b)-P(a^b)
What variable decides how different a t-curve is from a normal curve
degrees of freedom
Does the cause of death for wealth people follow a different distribution from the cause of death for poor people? Death certificates for 1500 wealthy people and 2500 poor people.
X2 Test for homogenity
What is the Equal SD condition for Liner
The residual plot shows similar scatter around residual = 0 for each x value
Name 5 types of bias
100 points for each type of bias named, no more than 500
Nonresponse Bias
Sampling Bias
Undercoverage
Convenience response
Confirmation bias
exclusion bias
observer bias