stats 2 0.0 / 5 MathematicsStatistics, averages and distributionsA2/A-levelOCR Created by: BethfrCreated on: 03-06-15 22:28 Requirements for Pearsons PMCC? Underlying population needs to be bivariate normal, bulk of data should roughly form ellipse on scatter graph, data needs to come from random sample 1 of 10 Null and alternative hypothesis for PMCC? H0: rho, p= 0...... h1: p>0... where p is the population correlation coefficient 2 of 10 Null and alternative hypothesis for Spearmans rank? H0: no association between variable and population of..... h1: some association between variable and population of.. 3 of 10 Formula for least squares regression line? (y - ymean) = m(x - xmean)... where m=(Sxy)/(Sxx) -- use formula book 4 of 10 Formula for a residual? observed y value - expected y value 5 of 10 Requirements for Poisson? 'events occur randomly and independently of each other' AND events occur at a uniform average rate 6 of 10 When can Poisson approximate Binomial? when n is large and p is small 7 of 10 When can Normal approximate Binomial? How? when n is large, p is about 0.5___ x~N(np,npq) 8 of 10 When can Normal approximate Poisson? How? when lambda is greater than 10____ x~N(lambda, lambda) 9 of 10 What is meant by the 5% significance level? there is a 5% chance of rejecting h0 when it is true 10 of 10

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