This preview shows pages 1–3. 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: Question 1 0.5 points Save During a cold winter, the temperature stayed below zero for ten days (ranging from 20 to 5). The variance of the temperatures of the ten day period can be either negative or positive can not be computed since all the numbers are negative must be at least zero is negative since all the numbers are negative Question 2 0.5 points Save The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals 4096 8 6,561 0 Question 3 0.5 points Save Exhibit 34 The following is the frequency distribution for the speeds of a sample of automobiles traveling on an interstate highway. Speed (MPH) Frequency 50  54 2 55  59 4 60  64 5 65  69 10 70  74 9 75  79 5 35 Refer to Exhibit 34. The mean is 35 67 670 10 Question 4 0.5 points Save Exhibit 34 The following is the frequency distribution for the speeds of a sample of automobiles traveling on an interstate highway. Speed (MPH) Frequency 50  54 2 55  59 4 60  64 5 65  69 10 70  74 9 75  79 5 35 Refer to Exhibit 34. The variance is 6.969 48.570 50.000 7.071 Question 5 0.5 points Save...
View
Full
Document
This note was uploaded on 03/14/2010 for the course ECON 153 taught by Professor Dail during the Spring '10 term at Southwestern Assemblies.
 Spring '10
 dail

Click to edit the document details