Preparation Questions The week after this assignment is due, we will discuss sec
ID: 3074298 • Letter: P
Question
Preparation Questions The week after this assignment is due, we will discuss sections 3.2 through 3.4 and 4.1 from your book. Read sections 3.4 through 4.1 in order to answer the preparation questions A bootstrap distribution must have what shape to compute a confidence interval from the percentiles? A bootstrap confidence interval can be computed using the standard error method OR using percentiles of a bootstrap distribution. If you use both, assuming the bootstrap distribution is the appropriate shape, will they give you exactly the same confidence interval, similar, or very different? 2. 3. As sample size increases, what happens to the width of a confidence interval? Does it increase, decrease, or stay the same? When conducting a hypothesis test, you need to state null and altenmative hypotheses. Which hypothesis (null or altermative) includes the "claim for which we seek significant evidence?" 4.Explanation / Answer
1. A bootstrap distribution must have symmetric, bell shaped to compute a confidence interval from the percentiles.
2. If the bootstrap distribution is symmetric, bell shaped, Standard Error method and Percentiles both give similar confidence interval.
3. As the sample size increases, width of a confidence interval decrease.
4. Alternative Hypothesis includes the "claim for which we seek significant evidence".