1-VAR DATA
Race, Color, Political Parties
What is Categorical Data?
For every 1 unit increase in x, the model predicts a ___ increase in y.
What is slope?
Each individual has an equal chance of being selected
What is random sample?
P(A&B)=P(A)xP(B)
What is checking for independence?
The probability that if H0 was true, we would observe a test statistic as far or further from H0
What is p-value?
Q1-(1.5)(IQR)
Q3+(1.5)(IQR)
What is the formula for calculating outliers?
Correlation ≠ Causation
What is FACTS?
Population is divided into non-homogeneous groups called clusters, SRS take from some of the clusters
What is cluster sampling?
Depends upon degrees of freedom
What is a t-distribution?
Table that tells you what percentage of values fall below a certain z-score in a standard normal distribution
What is a z-table?
Measures the average distance between individual data values and their mean
What is standard deviation?
Clear pattern in residual plot
What proves a linear model is not appropriate?
The variable which is measured to determine the effect of the treatment
What is the response variable?
2 outcomes, constant probability of success, independent trials, non-fixed number of trials
What are the requirements for a geometric setting?
The probability that the test correctly rejects a false null hypothesis
What is power?
z = (x-BLANK)/SD
Changes slope when removed
What is an influential outlier?
Random Assignment, Control, Replication
What are the 3 requirements of an good experiment?
2 outcomes, constant probability of success, independent trials, fixed number of trials
What are the requirements for a binomial setting?
If H0 is rejected (low p): We have significant statistical evidence to conclude (HA).
If H0 is not rejected (high p): We do not have significant statistical evidence to conclude (HA).
What are possible conclusions?
Finds the probability that the variable will fall into a certain interval
What does normalcdf calculate?
About __% of the variation in the dependent variable can be explained by the independent variable.
What is the coefficient of determination?
Reduces bias and variability
What is a "well-designed" experiment?
What is a tree diagram?
1) State H0, HA, and Type of Test
2) Check conditions
3) Conduct test, report all necessary results including significance level
4) Report decision (p-value< , reject H0) or (p-value> , fail to reject H0)
5) State conclusion in context of the problem
How do you conduct a hypothesis test?