# hw_09 - Name(s) (up to four students per homework set):...

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Due: In class, Friday April 11, 2008 Name(s) (up to four students per homework set) : Section number(s) 1. 2. 3. 4. For instructor or TA use only: Problem Score Points 1 20 2 15 3 15 4 15 5 20 6 15 M E 345 Spring Semester, 2008 Homework Set # 9 Professor J. M. Cimbala Total: 100 1 . (20 pts) Consider the whistling frequency data, submitted as results from the op-amp lab. I added results from a few previous semesters as well, so that there is a larger sample with which to work. I have also removed submissions from the jokers (e.g., Batman …we know who you are!). Pretend that a music recording company is coming to Penn State to hire whistlers for a musical. The company will hold try-outs, but only for whistlers with a dynamic range (difference between highest and lowest frequency) greater than 2500 Hz. Our lab data will be used as a statistical sample for the company. ( a ) Read the data into Excel. Note : It works best if you first copy the data to Notepad, and then copy from Notepad into Excel – the columns don’t align properly if you try to copy the data directly from the website into Excel. Create another column in Excel, showing the difference between the high and low frequency, i.e., the dynamic frequency range . Calculate the sample mean, sample standard deviation, sample median, and sample mode of the dynamic frequency range. Draw a histogram of the dynamic range data; comment qualitatively about the distribution (is it Gaussian?).

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## This note was uploaded on 07/23/2008 for the course ME 345 taught by Professor Staff during the Spring '08 term at Penn State.

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hw_09 - Name(s) (up to four students per homework set):...

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