Unit 1-2
With each additional x-variable, the predicted y-variable increases/decreases by the slope.
What is the interpretation of slope?
voluntary, non-response, response, undercoverage
What are types of biases?
A variable that takes on a countable/fixed set of values that can have gaps between them.
What is a discrete random variable?
We are 95% confident the interval 3.5 to 4.7 captures the true proportion of ... (context)
What is an interpretation for a z-interval?
df stands for ___
What is degrees of freedom?
Context, shape, unusual features, center, and variability.
What are the 5 things needed to describe a distribution?
The sample may not be representative of the population because the participants are easy to reach and not randomly sampled.
What is a Convenience Sample?
Two events that cannot occur together.
What is mutually exclusive?
Need CLT for ___ tests/intervals when n is less than __.
What is t, 30
data point - mean/standard deviation
What is a z-score calculation?
A segmented bar chart whose bars' widths display the marginal distribution of the variable represented by the bars.
What is a Mosaic Plot?
no treatment is used
What is an observational study?
Learning that one event has occurred does not change the probability that the other event occurs.
What are independent events?
Two sample t test is for ____, and one sample t test is for ____.
What is difference of means, mean difference?
If a graph is skewed right, the mean is ____ that the median.
What is greater than
A point with much larger/much smaller x values than the other points in the data set.
What is high leverage?
Random sample means _____, random assignment means____.
What is representative of all in population, you can say one thing causes another.
"Given that a car is pulled over, there is a 0.48 probability of the car being red" is an example of a ____.
What is a conditional probability interpretation?
Chi-squared homogeneity is for_____, independence is for ____, and goodness of fit is for _____.
What is two sample distributions, associations, one sample distribution.
The use of a regression line for prediction far outside the interval of values of the explanatory variable x used to obtain the line. Such predictions are often not accurate.
What is extrapolation?
Each subject receives 2 treatments in a random order.
Matched Pairs Design
P (A u B) = _____ (formula).
What is P (A) + P (B) - P (A n B)?
The conditions needed for a linear regression test.
What are Linear, Independent, Normal, Equal SD, Random?