2-Var Quantitative Data
A relationship where both variables increase together.
What is a positive correlation?
A group in an experiment that does not receive the treatment.
What is a control group?
Random, 10%, and large counts conditions.
What are the conditions for a 1-proportion z-interval?
Events that cannot happen at the same time; they are also known as disjoint events.
What are mutually exclusive events?
A correlation coefficient of 0.92 indicates this type of relationship.
What is a strong positive linear association?
This involves using a large enough number of experimental units to improve the reliability of observed differences.
What is replication?
A 95% confidence interval for the true proportion of students who prefer online learning is calculated to be (0.42, 0.58). What is this range of numbers called.
What is an interval that captures the true population proportion with 95% confidence?
P(A or B) = P(A) + P(B) − P(A and B)
What is the general addition rule?
The amount the predicted y changes for every one-unit increase in x.
What is the slope of the least-squares regression line?
A study that does not assign treatments.
What is an observational study?
The chance of getting your sample results or more extreme if the null hypothesis is true.
What is a p-value?
The calculation for a desired outcome. Also known as "chance."
What is probability?
This is the value calculated by subtracting the predicted value (8.5) from the observed value (10) in a regression analysis.
What is a residual of 1.5?
Dividing experimental units into groups based on a similar characteristic before randomly assigning treatments.
What is blocking?
A confidence interval for a population proportion is calculated to be (0.31, 0.45). This is the margin of error.
What is 0.07?
The probability of all tails in 5 coin flips.
What is (0.5)^5 or 0.03125?
64% of the variability in y is explained by the regression model.
What is the meaning of an R² value of 0.64?
A method where neither the participant nor evaluator knows the treatment assignment.
What is a double-blind experiment?
You fail to reject the null hypothesis that the population proportion is 0.25, but in reality, the true proportion is different.
What is a Type II Error?
The expected gain in a game where you win $10 with P = 0.2 and lose $2 with P = 0.8. Also, the probability of getting 5 heads in a row when flipping a fair coin.
What is 0.4 dollars and 1/32?