Physics I Lab Manual 2011 18

Physics I Lab Manual 2011 18 - hand from the equations in...

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EXPERIMENT 1. STATISTICS Analysis 1. Think about the uncertainty in your measurement of distance the ruler has fallen - after catching it are you measuring to the top of your fingers, the bottom? How well do you know the original position of the ruler?. Determine the minimum significant distance that your measurement can resolve (i.e. 1 mm? 5 mm? 1 cm? 2 cm? etc ... ) and round all values to the nearest measurement unit. 2. Create separate histograms for the data of the distance the ruler fell for each hand. Calculate the mean distance the ruler fell and the standard deviation for each and label these values on your histogram. 3. Enter your data into an Excel spreadsheet. Find the average and standard deviation for the data for each hand (for example by entering into two empty cells “=AVER- AGE(B1:B20)” and “=STDEVP(B1:B20)” to get the average and standard deviation of the data in the first 20 rows of column B). Your graphing calculator may also have the capability to calculate such statistics, or you can always calculate the values by
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Unformatted text preview: hand from the equations in the Theory section. 4. Record your (mean) reaction time (for each hand) based on the distance the ruler fell along with the uncertainty in this value (from the standard deviation). Express your reaction time in the form t = ¯ t ± δt . Note the reaction time should be in seconds, and must be calculated from the average distance the ruler fell. 5. Draw a vertical line on your histogram representing the mean value of your measured reaction time, as well as dashed vertical lines 1 standard deviation above and below this. The range between the dashed lines represents your measured range. What percentage of your measurements fall within this range? Is it close to the theoretical 68% value? 6. Determine with which hand you had a faster reaction time. Is the difference significant in light of the measurement uncertainty? 8...
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This note was uploaded on 01/27/2012 for the course PHY 2048l taught by Professor Staff during the Fall '08 term at University of Central Florida.

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