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Describing Data
Sampling
A little bit of everything
Distributions
Random Variables
100
Minimum, Q1, Median, Q3, Maximum
What are the the categories of a five-number summary
100
Type of sampling which involves dividing the population in heterogeneous groups (aka clusters) and then randomly choosing clusters from clusters.
Define cluster sampling.
100
P(A)P(B)
If A and B are independent then P(A intersect B) =
100
1
What is the area of all probability density curves?
100
Random variables that are discrete can only be a counted number, while continuous can assume values throughout the whole number line.
What is the difference between continuous and discrete variables?
200
Empirical Rule that applies to symmetric bell-shaped data
What does the 68-95-99 rule apply to?
200
True.
As a sample size increases the sampling error decreases. True or false?
200
When there is a small sample size when estimating the mean of a normally distributed population.
When is a t-distribution appropriate?
200
np
What is the equation for a binomial distribution mean?
200
False. Independence refers to when the event A does not affect the outcome of event B. While mutually exclusive refers to A and B not being able to occur at the same time.
Mutually exclusive and independent mean the same thing. True or False?
300
Median
What center measurement is resistant to extreme values?
300
Variable that drives two other variables, creating mistaken impression that these two variables are related by cause and effect
What is a lurking variable?
300
False.
If the linear model is good, the number of positive residuals will be the same as the number of negative residuals - True or False?
300
Null: Independence (no association) Alternative: Dependence (association)
What are the null/alternative hypotheses for Association test?
300
The binomial distribution is used for calculating the probability of certain number of success in a fixed number of trials.
Why to we use the binomial distribution?
400
False
If a distribution is symmetric, then it is also normal - True or False?
400
Experimentation where groups of subjects are divided into "blocks" and tested upon within each of these blocks
What is does blocking mean for an experiment?
400
The significance level (alpha)
The probability of a Type I error is equal to...
400
Higher degree of freedom
A t-distribution is closer to a normal distribution when you have...
500
False
If the min and max are equidistant from the median, and Q1 and Q3 are equidistant from the median too, this implies that the distribution is symmetric - True or False
500
Type of sampling which involves listing population in order, choosing a random point to start, and picking every kth subject from the list
What is systematic sampling?
500
State: State what you are going to do (including the test) Plan: Check conditions (random, independent, normal) Do: perform the steps, include degrees of freedom (if applicable), state formula of test or what you put in your calculator. Conclude: interpret the results in terms of the situation!
Describe EVERYTHING needed to answer a complete FRQ that involves hypothesis testing.
500
A geometric distribution is used for calculating probability of number of trials taken UNTIL success is achieved. The conditions are: 2 outcomes per event, independent observations, probability of success is constant and a varying number of trials is possible.
What is a geometric distribution (including the factors of a geometric setting)?