7. Inference for Quantitative Data(COLON) Means
Skills Focus: Selecting, Implementing, And Communicating Inference Procedures — Quiz
Test your understanding of skills focus: selecting, implementing, and communicating inference procedures with 5 practice questions.
Practice Questions
Question 1
In AP Statistics, what is the most important reason to use a $t$ procedure instead of a $z$ procedure when making an inference about a population mean and the population standard deviation is unknown?
Question 2
Which set of conditions is most appropriate to check before performing a one-sample $t$ interval for a population mean?
Question 3
A student wants to estimate the mean time all AP Statistics students spend studying each week. The student takes a random sample of $n=40$ students and computes a sample mean of $12.5$ hours with sample standard deviation $4.0$ hours. Which procedure is most appropriate?
Question 4
Which null and alternative hypotheses are correct for testing whether the average number of hours studied is greater than $10$ hours?
Question 5
A confidence interval for a mean is reported as $(8.2, 11.6)$. What is the margin of error?