10ProbStatHW1Sol

# 10ProbStatHW1Sol - SIEO 3600.002 Introduction to...

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SIEO 3600.002 Solutions Assigment #1 Introduction to Probability and Statistics January 29, 2010 Prof. Chenxin Li Page 1 of 3 Solutions Assigment #1 1. Discuss whether these data are categorical or quantitative. (a) Zip codes: Categorical data. (b) Eye colors in a demographics survey: Categorical data. (c) Colors in a human vision study: Quantitative (measure of wavelength, frequency etc), Categorical (blue, black, yellow etc.) 2. The following is a sample of the answers to the diﬃculty level question in the class survey: 3; 3; 3; 2; 4; 4; 3; 5; 4; 3; 3; 3; 2; 5; 3; 3; 5; 4; 2; 3; 4; 4; 4; 4; 3; 4; 5; 4; 3; 4; 1 where 1 stands for easy while 5 stands for hard. Summarize these data in a frequency table and a bar plot. Figure 1: Frequency table problem 2. Level of Diﬃculty Frequency 1 1 2 3 3 12 4 11 5 4 3. The following are the estimated oil reserves, in billions of barrels, for four regions in the western hemisphere. United States

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10ProbStatHW1Sol - SIEO 3600.002 Introduction to...

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