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to Introduction Biostatistics Tao Wang Department of Epidemiology and Biostatistics College of Public Health University of South Florida September 20, 2005 Outline Data example Variable and distribution Descriptive statistics and sampling distribution Inferential statistics Estimation, hypothesis testing and confidence interval Continuous: Correlation and regression Categorical: Chi-square test...
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to Introduction Biostatistics
Tao Wang
Department of Epidemiology and Biostatistics College of Public Health University of South Florida
September 20, 2005
Outline
Data example Variable and distribution Descriptive statistics and sampling distribution Inferential statistics
Estimation, hypothesis testing and confidence interval Continuous: Correlation and regression Categorical: Chi-square test
Association
Breast cancer example
Study on whether age at first child birth is an important risk factor for breast cancer (BC).
Age BC
30
683 (21.2%) 1498 (14.6%) 2181
29
2537 8747 11284
Total
3220 10245 13465
case control Total
(MacMahon, B. et al., 1970, Rosner, B. 1995, p346)
Blood pressure example
How does taking Oral Conceptive (OC) affect Blood Pressure (BP) in women paired samples
Systolic blood pressure Baseline (Not 1-year (Using Subject i using OC) OC) 1 115 128 2 112 115 3 107 106 4 119 128 5 115 122 6 138 145 7 126 132 8 105 109 9 104 102 10 115 117 Difference 13 3 -1 9 7 7 6 4 -2 2
(Rosner, B. 1995, p253)
Birthweight Example
Determine the effectiveness of drug A on preventing premature...
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USF - NR - 19730
Introduction to BiostatisticsTao WangDepartment of Epidemiology and Biostatistics College of Public Health University of South FloridaSeptember 20, 2005Outline Data example Variable and distribution Descriptive statistics and sampling dist
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by James BaldwinFor many days before Siegfrieds departure, the queen, and all the women of the household, busily plied their needles; and many suits of rich raiment made they for the prince and his worthy comrades. At length the time for leave-taki
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Chapter 8: How the Grand Gallipoot Joined the NomesAfter leaving the Whimsies, Guph continued on his journey and penetrated far into the Northwest. He wanted to get to the Country of the Growleywogs, and in order to do that he must cross the Ripple
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by Robert Louis StevensonNest EggsBirds all the sunny day Flutter and quarrel Here in the arbour-like Tent of the laurel. Here in the fork The brown nest is seated; Four little blue eggs The mother keeps heated. While we stand watching her Starin
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