6.1 Confidence Intervals for Population Proportions
What the interval is calculated from.
What is sample data?
This is what Margin of Error accounts for when taking a sample from a population.
What is natural variability?
This hypothesis always states the population proportion is equal to a value.
What is the null hypothesis?
This is when you reject the null but in reality you should fail to reject the Null.
This gives us a range of the plausible values for p.
What is an interval?
The equation used to find point estimate.
What is (A + B)/2?
This is the formula for Margin of Error.
What is Margin of Error = z* √p̂(1-p̂)/n?
This hypothesis always states the population proportion is above or below a value.
What is the alternative hypothesis?
This is when you fail to reject the null and in reality you should reject the null.
What is a Type 2 Error?
If we have a 95% confidence Interval then our significance level is...
What is a 5% significance level?
"We are C% confident that the interval from A to B captures the [parameter in context]" is an example of.
What is a confidence interval?
These 3 things can increase the Confidence Level.
What is increase critical value, increase margin of error and have a larger interval?
This is the name of the symbol used for significance level.
What is alpha symbol?
P(Type 1 Error) is equal to...
What is the significance level?
If the confidence interval doesn't contain the null hypothesis from a two-sided test, we would...
What is reject Ho?
A numerical value that describes a characteristic of an entire population.
What is a parameter?
This test is used to estimate a population proportion when you have a single sample and want to create a confidence interval around the sample proportion
What is 1-PropZInt?
This is what you do when your p-value is smaller than your significance level.
What is reject Ho?
The relationship between type I and type II errors is an example of this.
What is an indirect relationship?
If the confidence interval contains the null hypothesis from a two-sided test, we would...
What is fail to reject Ho?
The conditions required for a confidence interval.
What is Random samples, Independent (n ≤ .10 (population)) and Normal large count tests np ≥ 10 and n(1- p) ≥10.
This is the effect on sample size as a result of a decreased margin of error.
What is an Increasing Sample Size?
This is the result of the study if the p-value is larger than the significance level.
What is not statistically significant?
This is the relationship between type I error and power...
What is a direct relationship?
This is the equation for a confidence interval with a difference between two proportions.
What is statistics +/- (Critical Value) * (Standard Deviation)?