W3600_Quiz1_Sol

W3600_Quiz1_Sol - SIEO 3600(IEOR Majors First Quiz...

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Unformatted text preview: SIEO 3600 (IEOR Majors) First Quiz Introduction to Probability and Statistics February 18, 2010 Page 1 of 6 First Quiz Place all answers on the question sheet provided. The quiz is open textbook (Ross) and open notes/homework. You are allowed to use a calculator, but not a computer. Write all answers clearly and in complete sen- tences. All answers should be supported by analysis or an argument. This quiz has a total of 20 points. First Name: Last Name: Honor Code I resolve i ) not to give or receive aid during this examination, and ii ) to take an active part in seeing that other students uphold this Honor Code. Signature: 2 SIEO 3600, First Quiz 1(a) 1(b) 1(c) 1(d) 2(a) 2(b) 2(c) Total SIEO 3600, First Quiz 3 1. Mike was asked to conduct a statistical analysis of the hospital lengths of stay in an effort to study the patterns of recovery among disease groups and gender groups. Below are some part of analysis and please help him finish the report. (a) Mike drew a histogram of the length of stay for 100 (48 female and 52 male) patients (see the figure below). He also calculated the sample mean , median and variance of them. However he forgot to mark down the types of these three numbers he got. Having no access to the original data, can you help him to identify the type of each numerical summary based on the information in the histogram? Please state your reasoning for them. (3 points) Histogram of Length of Stay Length of Stay Frequency 10 20 30 40 50 10 20 30 40 i. 59 . 7 ← Sample Variance ....
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W3600_Quiz1_Sol - SIEO 3600(IEOR Majors First Quiz...

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