LESSON 2 - DATA COLLECTION

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4 physci_lesson2.nbIn this case, the guess was 17 and the actual value was 19.accuracy ⩵ 1 2019 1 ⋆ 100 ⩵ 94.7 In this case, the guess was 20 and the actual value was 19. PrecisionPrecision is the smallest unit of measurement that can be repeated.Examples:1mm.If the smallest unit of measurement on a ruler is millimeters, the precision of the measurement isIf you are measuring distance on a football field, 1yd would be the precision.A good analogy of accuracy and precision is a target board with different patterns.image from http://www.spcforexcel.com/monitoring-test-methods-using-spc ErrorError is how far a prediction or measurement is from the ‘true’ value of something. Error is the opposite ofaccuracy and can be determined by subtracting the accuracy from 100%.Example: If the accuracy of a measurement is 89%, there is error of 11%. Statistics and ProbabilityStatistics are lists of facts.Also, ‘statistics’ is the study of the collection, organization, and interpretation of data.Probability is the likelyhood of something happening. Check out this website for some statistics about thesafety of flying:http://planecrashinfo.com/cause.htm
physci_lesson2.nb 5 Know the types of relationships that exist between variables.VOCABULARY / CONCEPTS- direct relationship- inverse relationship- mean- median- range Direct and Inverse RelationshipsThis graph shows a direct relationship between temperature and carbon dioxide. When one increases, the otherincreases.Graph from zfacts.com.There is inverse relationship between temperature and pressure. If temperature is high, pressure is low. As oneincreases, the other decreases.908070601016101210081004Sun Mon Tue Wed Thu Fri SatAug 7 Aug 8 Aug 9 Aug 10 Aug 11 Aug 12 Aug 13Temperature vs. TimeAir Pressure vs TimeSun Mon Tue Wed Thu Fri SatAug 7 Aug 8 Aug 9 Aug 10 Aug 11 Aug 12 Aug 13
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LESSON 2 - DATA COLLECTION

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