Lecture%209%20%28March%2016%29

Lecture%209%20%28March%2016%29 - GEOG GEOG2006 Statistical...

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EOG 2006 atistical GEOG 2006 – Statistical Methods in Geography Lecture 8 arch 9, 2011 March 9, 2011
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Lab 6 versus Lab 8
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b) Dependent two mple t st 3b) Dependent two sample t test sed when there are pairs in the same sample (i.e., Used when there are pairs in the same sample (i.e., dependent information) For example, a sample of students are tested before a certain educational program, and the same group is tested after, to see if there is a difference in their test results Same individuals, but results are in pairs
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x f n s t D = d.f. = n 1 D ample of repeated measures ifference Example of repeated measures Difference Number Name Test 1T e s t 2 1 Mike 35% 67% 32 2 Melanie 50% 46% 4 3 Melissa 90% 86% 4 4 Mitchell 78% 91% 12
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a) Independent two sample t st 3a) Independent two sample t test The two sample test statistic (t or z) his test is used only 2 2 2 1 σ This test is used only when the two population variances are assumed to 2 1 2 1 n n x x + = be different 2 1 x x t = The two sample sizes may or may not be equal d therefore ms t be 2 1 x x and therefore must be estimated separately
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Lab 7
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Lab 8
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No lab next week Extension: Lab 8 is due March 28/March 29 Lab 9 will be assigned March 28/March 29 b 9 will be due a week after that in the drop box Lab 9 will be due a week after that in the drop box
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Counties Degree Managers lgoma 659 677 Bivariate correlation Algoma 6.59 6.77 Brant 5.50 8.20 Bruce 5.84 6.41 ochrane 5.44 6.58 Examining the relationship between two variables Cochrane Dufferin 7.05 9.78 Durham 7.25 10.59 Elgin 4.04 6.69 Recap: independent and ependent Essex 7.94 8.14 Frontenac 13.94. .. 8.50… etc. dependent In geography often a •the percentage of population aged 15 years and over with a university degree spatial component •percentage of total labour force in managerial or administrative occupations
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The correlation method selected largely depends on the: •s c a
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Lecture%209%20%28March%2016%29 - GEOG GEOG2006 Statistical...

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