STATISTICS FINAL

1-VAR DATA

100

Race, Color, Political Parties

What is Categorical Data?

200

Q1-(1.5)(IQR)

Q3+(1.5)(IQR)

What is the formula for calculating outliers?

300

Measures the average distance between individual data values and their mean

What is standard deviation?

400

z = (x-BLANK)/SD

What is population mean?

500

Finds the probability that the variable will fall into a certain interval

What does normalcdf calculate?

2-VAR DATA

100

For every 1 unit increase in x, the model predicts a ___ increase in y.

What is slope?

200

Correlation ≠ Causation

What is FACTS?

300

Clear pattern in residual plot

What proves a linear model is not appropriate?

400

Changes slope when removed

What is an influential outlier?

500

About __% of the variation in the dependent variable can be explained by the independent variable. 

What is the coefficient of determination?

COLLECTING DATA

100

Each individual has an equal chance of being selected

What is random sample?

200

Population is divided into non-homogeneous groups called clusters, SRS take from some of the clusters

What is cluster sampling?

300

The variable which is measured to determine the effect of the treatment

What is the response variable?

400

Random Assignment, Control, Replication 

What are the 3 requirements of an good experiment?

500

Reduces bias and variability

What is a "well-designed" experiment?

PROBABILITY

100

P(A&B)=P(A)xP(B)

What is checking for independence?

200

Depends upon degrees of freedom

What is a t-distribution?

300

2 outcomes, constant probability of success, independent trials, non-fixed number of trials

What are the requirements for a geometric setting?

400

2 outcomes, constant probability of success, independent trials, fixed number of trials

What are the requirements for a binomial setting?

500

1. Fill in the probabilities on the branches.
2. Consider which outcomes are required to answer the question.
3. Find the probability of those outcomes by multiplying along the branches.
4. Use the probability/probabilities you have calculated to answer the question

What is a tree diagram?

SAMPLING DISTRIBUTIONS

100

The probability that if H0 was true, we would observe a test statistic as far or further from H0

What is p-value?

200

Table that tells you what percentage of values fall below a certain z-score in a standard normal distribution

What is a z-table?

300

The probability that the test correctly rejects a false null hypothesis

What is power?

400

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?

500

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?