Observational error

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    Catalase Essay

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    As the method states that only two drops of detergent must be added to the peroxide, if the amount of detergent is not consistent, then the results may not be accurate as more foam can be produced because of the additional amount of detergent. For future investigations, instead of using the teat pipettes, the amount of detergent could be measured in a measuring cylinder to ensure that the amount of detergent added remains consistent. Increasing the sample size will increase precision, minimising the impact of random errors. Moreover, an average of the data could potentially reduce the effect of random errors on the data. The graph can be used to detect random errors through the amount of scattering in the results. Improvements could occur, with numerous trials, therefore, conducting an average of trials to minimise the effect of inaccurate measurements on the…

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    Pendulum Essay

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    the average being linear. This line is shown to cut through the period axis at 1.3593 seconds, as the gradient is so low, it is assumed that the period for all masses recorded was approximately 1.3593 seconds. The graph shows that as the mass of a pendulum ball increases, the period virtually isn’t affected. The table and graph both indicate low scatter between trials, this is seen on the graph as the different points for each increment of mass are close together. The line of best fit in the…

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    11a Lab Report

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    If you want to get 100x better precision, you need 10,000x the number of measurements. In addition, there might be systematic errors that might for example depend on the person carrying out the measurement (reaction time) etc. Let’s explore a much more precise way of measuring velocity – photogates. We use two photogates that are connected to the computer. They consist of a little light emitting diode and a photo detector. If the spaced between the light emitter and the detector is blocked, an…

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    Acetic Acid Lab Report

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    As it is required that you rely on the human eye to determine when the indicator displays the end-point of the titration. Repeating an experiment using alternate equipment is crucial in revealing the accuracy of the titration. Different equipment assists in eliminating almost all forms of systematic errors. However, time constraints often determine whether or not this can be achieved, and in this case, there was not enough time to repeat the process with new equipment. Repeating the experiment…

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    Bottle Rocket Experiment

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    therefore potentially resulting in an effect on the motion of the bottle and the height data recorded at an unknown level; as opposed to that in theoretical conditions. Moreover, incorrect initial scaling of length measurement on the data analysis soft-wear, could have resulted in incorrect heights being deemed to have been reached by the bottle rocket. The nature of the freeze frame data analyzation on Pasco also resulted in time recordings that had slight discrepancies of maximum 0.033 seconds…

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    graph with the gradient of 1 divided by the square root of the acceleration of gravity is used. The length of the pendulum rod is increased every 2cm from 17cm until it reaches 25cm (i.e. five values). Ten oscillations are measured for each length and divided by ten and this is repeated ten times for each length. An average period is found for each of these lengths along with their uncertainties using the equations (3) and (4). A graph needs to be plotted with the period of the y-axis and 2π√L…

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    Stereotype Threat Research

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    When the same test was presented as non-diagnostic of ability, they performed equivalently to their Caucasian peers. Thus, this research indicates that the mere salience of negative societal stereotypes, which may magnify over time, can impede performance (Steele & Aronson, 1995). The stereotype that African-American students are intellectually inferior to White students may in fact have real-life implications. The theory of stereotype threat, therefore, offers a contextual explanation for the…

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    precision of freshwater partial pressure of CO2 (pCO2) estimates. To better understand observational uncertainty in CO2 flux from inland waters, here we conduct an analysis of historical observations and take new field observations at the North Temperate Lake Long Term Ecological Research (NTL LTER) site to quantify random errors in freshwater carbon system. We further estimate errors contribution to the precision of pCO2 derived from multiple carbonate equilibria and identify other sources of…

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    Volumetric Pipette Lab

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    For, example, final volume of the mean volume of 10ml of water is calculated to 10. ; Analysing the density vs temperature graph as temperature increase the density will decrease. In graph above show that when temperature is 160C our density is 0.998 in other hand temperature is 19.00C and density is 0.9972.Random errors in this particle are measuring the water on volumetric pipette. Random errors are minimized by taking more data and it can be reduced by averaging the data which we collect…

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    Photosynthesis Lab Results

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    01g as seen above. The potato which was placed into the ethanol solution can also be classified as precise, as the average weight difference is identical to that of the weight difference caused the glucose solution. Low levels of precision can be accounted for by random errors. Random errors are errors caused my unpredictable factors such as wind change or a mistake in the method. In this experiment, there are many possible sources of random errors that may have influenced the results and these…

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