Basic_Statistics_lab

# Basic_Statistics_lab - Name Date of lab Lab 2 Section...

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Name: ______________________________________________ Date of lab: ______________________ Section number: M E 345._______ Lab 2 Precalculations – Individual Portion Basic Statistics Lab: Calculation of Basic Statistics Precalculations Score (for instructor or TA use only): _____ / 20 1. Using the standard resistor color code (available on the M E 345 website, References ), determine the resistance and tolerance of a resistor with the following four color bands: red, blue, yellow, and gold. 2. The tolerance on resistors is ± 2 σ by convention, i.e., approximately 95% confidence level. With 95% confidence, what is the range of resistance that you would expect to measure experimentally for resistors of the color banding of Question 1? Estimate the standard deviation. 3. A company manufactures resistors with R = 4.7 ohms and a tolerance of around ± 0.23 ohms. What color bands should they paint on these resistors? 4. Some resistors have 5 bands instead of 4. Do the five-band resistors have a more accurate or less accurate value than the four-band resistors? Justify your answer, i.e., discuss.

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Lab 2 Cover Page for Lab Report – Group Portion Basic Statistics Lab: Calculation of Basic Statistics Name 1: ___________________________________________________ Section M E 345._______ Name 2: ___________________________________________________ Section M E 345._______ Name 3: ___________________________________________________ Section M E 345._______ [Name 4: ___________________________________________________ Section M E 345._______ ] Date: ______________________ Group Lab Report Score (For instructor or TA use only) : Lab experiment and results, plots, tables, etc. _____ / 50 Discussion _____ / 20 Neatness & grammar _____ / 10 TOTAL ______ / 80 Comments (For instructor or TA use only) : NOTE: The instructor or TA reserves the right to deduct points for any of the following: Arriving late to lab or leaving before your lab group is finished. Not participating in the work of your lab group (freeloading). Causing distractions, arguing, or not paying attention during lab. Other (at the discretion of the instructor or TA).
Basic Statistics Lab: Calculation of Basic Statistics Author: John M. Cimbala, Penn State University Latest revision: 25 July 2007 Introduction and Background ( Note : To save paper, you do not need to print this section for your lab report.) The engineering profession is dependent on both accurate and precise representation of experimental data. Unfortunately, due to inherent uncertainties involved in making measurements, the exact value is often not obtainable. Consider, for example, measurement of the thickness of a piece of metal. Metal can be purchased in standard “stock” sizes, such as ¼-inch steel stock a sheet of steel, nominally 0.2500… inches thick. However,

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Basic_Statistics_lab - Name Date of lab Lab 2 Section...

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