# Test 2 - MSIS 361A Fall 2000 Exam II Dr. Hanizavareh Name _...

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

MSIS 361A Exam II Dr. Hanizavareh Fall 2000 Name ___________ Note: To earn credit with the problem section you must show reasonable work. A correct answer without work will not be given credit. Problem 1. The weights of cans of soup produced by a company are normally distributed with a mean of 15 ounces and a standard deviation of 0.5 ounces. ( Chapter 7) a) What is the probability that a can of soup selected randomly from the entire production will weigh at most 14.3 ounces? (2) b) Determine the minimum weight of the heaviest 5% of all cans of soup produced. (2) c) If 28,390 of the cans of soup of the entire production weigh at least 15.75 ounces, how many cans of soup have been produced? (1) Problem 2. A local newspaper sells an average of 2100 papers per day, with a standard deviation of 500 papers. Consider a sample of 60 days of operation .(Chapter 8) a) What is the shape of the sampling distribution of the sample mean number of papers sold per day? Why? (1) b) Find the expected value and the standard error of the sample mean. (2) c) What is the probability that the sample mean will be between 2000 and 2300 papers.? (2) Problem 3. (Chapter 9) A random sample of 10 waitresses in Iowa City, Iowa revealed the following hourly earnings (including tips): \$19 18 15 16 18 17 16 18 20 14 a) If the hourly earnings are normally distributed with a standard deviation of \$4.5, estimate with 95% confidence the mean hourly earnings for all waitresses in Iowa City. (3) b) Interpret the interval obtained in part (a). (2)

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

View Full Document
Multiple Choice: (Do not show your work for this section!) 1. A sample of size 200 will be taken at random from an infinite population. Given that the population
This is the end of the preview. Sign up to access the rest of the document.

## This document was uploaded on 12/01/2011.

### Page1 / 4

Test 2 - MSIS 361A Fall 2000 Exam II Dr. Hanizavareh Name _...

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

View Full Document
Ask a homework question - tutors are online