final_s04

final_s04 - Final Exam - Spring 2004 - ST 370...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Final Exam - Spring 2004 - ST 370 Online/Distance Darken the circle on the answer sheet corresponding to your answer. Use a number 2 pencil. Stray marks on the form may cause errors. All questions are worth 4 points. 1. Which of the following are measures of location? A. sample median B. sample mean C. sample standard deviation D. A and B E. None of the above 2. An important distinction in the second half of the course is between discrete and continuous random variables. Which one of the following types is a continuous random variable? A. Poisson B. binomial C. Weibull D. A and B E. None of the above 3. In the early lesson on hypothesis testing, the following statement was found in the summary (talking about comparing two population mean values): The p value is a useful measure of evidence against the null hypothesis. But one must be careful because a small p value can be due to either (i) a small population mean difference and large sample sizes. or (ii) a large population mean difference and small sample sizes For which of those two situations would we say we have a statistically significant result but not likely a practically significant result ? A. (i) B. (ii) 4. We are studying a population with unknown mean and standard deviation that we guess is around 2. We plan to take a random sample and want to construct a 90% confidence interval of length 3 (right endpoint- left endpoint = 3). How large should the sample size be? A. 34 B. 5 C. 16 D. 43 E. None of the above. 1 5. For confidence intervals and hypothesis tests based on Z statistics, we often have to look up special constants from the standard normal table. We use the notation z for the (1- )100th percentile, P r ( Z > z ) = . Find z . 02 ....
View Full Document

This note was uploaded on 01/16/2012 for the course ST 370 taught by Professor Nail during the Spring '08 term at N.C. State.

Page1 / 6

final_s04 - Final Exam - Spring 2004 - ST 370...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online