# stats 2

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• Created by: Bethfr
• Created 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
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Null and alternative hypothesis for PMCC?
H0: rho, p= 0...... h1: p>0... where p is the population correlation coefficient
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Null and alternative hypothesis for Spearmans rank?
H0: no association between variable and population of..... h1: some association between variable and population of..
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Formula for least squares regression line?
(y - ymean) = m(x - xmean)... where m=(Sxy)/(Sxx) -- use formula book
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Formula for a residual?
observed y value - expected y value
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Requirements for Poisson?
'events occur randomly and independently of each other' AND events occur at a uniform average rate
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When can Poisson approximate Binomial?
when n is large and p is small
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When can Normal approximate Binomial? How?
when n is large, p is about 0.5___ x~N(np,npq)
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When can Normal approximate Poisson? How?
when lambda is greater than 10____ x~N(lambda, lambda)
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What is meant by the 5% significance level?
there is a 5% chance of rejecting h0 when it is true
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## Other cards in this set

### Card 2

#### Front

Null and alternative hypothesis for PMCC?

#### Back

H0: rho, p= 0...... h1: p>0... where p is the population correlation coefficient

### Card 3

#### Front

Null and alternative hypothesis for Spearmans rank?

#### Back ### Card 4

#### Front

Formula for least squares regression line?

#### Back ### Card 5

#### Front

Formula for a residual?

#### Back 