HW-3 - Question 1 0.5 points Save During a cold winter, the...

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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 3-4 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 3-4. The mean is 35 67 670 10 Question 4 0.5 points Save Exhibit 3-4 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 3-4. The variance is 6.969 48.570 50.000 7.071 Question 5 0.5 points Save...
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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.

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HW-3 - Question 1 0.5 points Save During a cold winter, the...

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