Lecture 6 - 4.8 x 10 6 cell/ L 5.6 x 10 6 cell/ L 5.4 5.2...

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Chapter 4. Statistics (II) 5.1 3 Count on “normal” days Today 5.3 4.8 5.4 5.2 x 10 6 cell/ μ L 5.6 x 10 6 cell/ μ L tudent’st st Student s t-test Confidence interval: William Sealy Gosset
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1. Confidence interval for estimates of experimental uncertainty Example: A student measure a vessel five times and observe values of 6.375 p 6.372, 6.374, 6.377, and 6.375 mL. x 1 ) ( 2 = n x x s i i = ± n ts / 2. Comparing a measured results with a “know” value Count on “normal” days Today 5.1 5.3
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Unformatted text preview: 4.8 x 10 6 cell/ L 5.6 x 10 6 cell/ L 5.4 5.2 3. Comparing two sets of repeating experiments: The discovery of Ar by Load Rayleigh: John William Strutt Air: O 2 and N 2 Where the difference between s1 and s2 are significant, following equations are valid F test Q test for bad data Q test 2 47 12 48 12 53 12 56 2 67 12.47 12.48 12.53 12.56 12.67 ? Homework: 4-1, 4-2, 4-3, 4-8, 4-9, 4-11, 4-20, 4-21, 4-22...
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Lecture 6 - 4.8 x 10 6 cell/ L 5.6 x 10 6 cell/ L 5.4 5.2...

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