Flashcards
Stats
Cards in this deck (24)
- 1Refutablepossible to falsify
- 2Explanatory variableindependent, x axis
- 3ResponceDependent, y axis
- 4Qualitative datacatagoric and discontinuous
- 5RankedBest to worst
- 6Quantitative dataContinuous, measurements are on a true zero or relative scale
- 7Standard error showsthe reliability of the sample mean as an estimate of the true population mean
- 895% confidence limitsthe range of plausible values of the true mean within the sample data
- 9One sample t test looks forasymmetry, deviations from the trend
- 10Paired t tests showchange in the same individuals over time as conditions are changed
- 11Two sample t test showsdifferences between two different sample means
- 12Analysis of variance showsdifferences between more than 2 sample means
- 13Linear regression analysislooks for a trend
- 14Chi squared showsdependency in a contingency table. (catagoric data only)
- 15Error bars vs rangeSymmetrical vs non symmetrical
- 16Natural frequencye.g. 34 in every 1000 people
- 17Conditional probabilitiesuses test to determine likelyhood in combination with natural frequencies
- 18Absolute risk reductioncomparison with data. e.g. 9 in 100 less deaths = 9% risk reduction
- 19Relative risk reductioncomparison of data with data set. e.g. risk reduction divided by the initial death count within a population x 100
- 20Number needed to treatUses natural frequencies to find realistic change criteria e.g. 9 per 1000 saved with drug means to save one person 111 people must be using the drug
- 21t test assumptions- Independent
- X ~ N
- Large and representative sample size
- Homogeneity of variance - 22Assumptions of Analysis of variance- random sampling
- X ~ N
- equal variation around means
- independent observations - 23Linear regression assumptions- random sampling
- independent
- X ~ N
- constant variation around line
- Linear trend - 24Chi squared assumptions- Random sampling
- Independent observations
- representative sample size
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- Biology (Core skills) Flashcards on Stats, created by Ethan Ross on 25/01/2018.
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- Ethan Ross
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