Confidence Intervals
The initial guess for the value of the population mean/proportion from your sample
What is a point estimate?
A false decision where you erroneously reject the null hypothesis
What is a Type I Error?
The command used to obtain the confidence interval for a single sample where you want to estimate the mean
Tinterval
The command used to perform a hypothesis test for a sample mean
What is T-Test?
The bandwidth or radius of your confidence interval
What is margin of error?
A false decision where you do not reject the null hypothesis
What is a Type II Error?
The command used to obtain the confidence interval for paired data where you're estimating the true mean
Tinterval
The command used to perform a 2-sample t test for a mean
2-SampTTest
A confidence interval becomes ___er when the confidence level is increased (and everything else is held constant)
What is wider?
A decision you make when performing a hypothesis test at significance level of 0.05, with a p-value of 0.0008
What is "reject the null hypothesis"?
Converting paired data to a single set of data on your calculator
What is L3 = L1-L2?
The command used to perform a 2-sample proportion test
What is 2-PropZTest?
When calculating the minimum sample size for a confidence interval of a specified margin of error, you always round the result __
A test to determine how well your observed data matches an expected distribution.
What is a chi-square goodness of fit test?
The command to perform a two sample proportion test
What is 2-propZTest?
The command used to perform a test for goodness of fit
X2-GOF Test
A fitness trainer is interested in the improvement of average weight loss among a group of people in a fitness program, and obtains a confidence interval of (-2.5, 3.7), estimating the true weight loss in lbs. They draw a conclusion regarding the efficacy of the fitness program.
What is "inconclusive"?
A test to determine if there's a significant relationship between two categorical variables
What is a Chi-square test of independence?
The command to perform a two-sample t test
What is 2-sampTTest?
The command used to perform a test of association between two categorical variables
What is X2-Test?