BIO SCI 100 Midterm: 10
25 Mar 2017
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Pop mean: mean for total pop, true mean. (median)=equal to obv w/ equal # of obs above/below. If n=even, add 2 middle obv, divide by 2. Better than mean if obv drastically change mean. (mode)=visual estimate of where obv occur, useful for student who want to inspect data fast: calc standard eorr: se=std/sqrt(n). Stdev. p (assumes entire population) uses n method : stdev. s(assumes sample from population) uses the n-1 method. Stdev (assumes a sample from the population) uses the n-1 method older function for backward compatibility: r syntax: expression (simple math). == b/c check if two values equal: variables: store something as variable to use later. (x
