hw5 - Homework 5 (due Mar. 17) 1. Suppose we would like to...

Info iconThis preview shows pages 1–2. 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: Homework 5 (due Mar. 17) 1. Suppose we would like to detect a difference of in a test on the mean with a two-sided alternative with probability 0.95 (and = 0 . 05). We are interested in the required sample size in two cases: when the standard deviation is known to be equal to 3 and it has been estimated to be 3. Find the corresponding sample sizes using Minitab if a) = 1; b) = 3; c) Compare the relative differences in sample sizes in a) and b). Comment on where it is larger and why. 2. Cloud-seeding has been studied as a weather modification procedure. The rainfall in acre-feet from 20 clouds that were selected at random and seeded with silver nitrate follows: 18.0, 30.7, 19.8, 27.1, 22.3, 18.8, 31.8, 23.4, 21.2, 27.9, 31.9, 27.1, 25.0, 24.7, 26.9, 21.8, 29.2, 34.8, 26.7, 31.6. You can use Minitab to solve this problem. a) Can you support a claim that mean rainfall from seeded clouds exceeds 25 acre-feet? Use = 0 . 01....
View Full Document

This note was uploaded on 03/17/2008 for the course IE 121 taught by Professor Perevalov during the Spring '08 term at Lehigh University .

Page1 / 2

hw5 - Homework 5 (due Mar. 17) 1. Suppose we would like to...

This preview shows document pages 1 - 2. Sign up to view the full document.

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