This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: STATISTICS W1211 Spring 2008 (Section 1) Homework 1  Due Fri Feb 8 at 4pm Note: Section 1 will NOT be graded. You can points simply by attempting the questions. The other sections will be graded. Section 1 (4 points each) 1. A sample of n = 10 cars was selected and each was subjected to a 5 mph crash test. Denoting a car with no visible damage by S (for success) and a car with visible damage by F, results are as follows: S F F S S S F F S S. (a) What is the value of the sample proportion of successes x/n ? (b) Replace each S with a 1 and each F with a 0. Then calculate ¯ x for this numerically coded sample. How does ¯ x compare to x/n ? (c) Suppose it is decided to include 15 more cars in the experiment. How many of these would have to be S’s to give x/n = 0 . 8 for the entire sample of 25 cars? 2. The following is data on oxygen consumption (mL/kg/min) for a sample of ten fire fighters performing a firesuppression simulation: 29.5 49.3 30.1 28.2 28.0 26.1 33.9 29.3 23.5 31.0. Compute the following:29....
View
Full
Document
This homework help was uploaded on 04/21/2008 for the course STAT 1211 taught by Professor Hernandez during the Spring '08 term at Columbia.
 Spring '08
 Hernandez
 Statistics

Click to edit the document details