Báo cáo khoa học: "Statistics review 7: Correlation and regression" pot

... the A&E data, the correlation coefficient is 0.62, indicat- ing a moderate positive linear relationship between the two variables. Review Statistics review 7: Correlation and regression Viv ... values, and y – is the mean of the y values. This is the product moment correlation coefficient (or Pearson correlation coefficient). The value of r always lies between –1 and +...

Ngày tải lên: 12/08/2014, 20:20

... values generally lie close to the mean, and this is reflected in the tall, narrow distribution. Review Statistics review 2: Samples and populations Elise Whitley* and Jonathan Ball † *Lecturer in Medical ... falls between mean – 2 SD and mean + 2 SD; (c) 99.7% of the distribution falls between mean – 3 SD and mean + 3 SD; and (d) 95% of the distribution falls between mean – 1....

Ngày tải lên: 12/08/2014, 18:21

... ‘presenting and summarizing data’, ‘samples and populations’, ‘hypotheses testing and P values’, ‘sample size calculations’, ‘comparison of means’, ‘nonparametric means’ and correlation and regression’. Future ... the observed and expected fre- quencies. These differences are referred to as residuals, and they can be standardized and adjusted to follow a Normal dis- tribution...

Ngày tải lên: 12/08/2014, 20:20

... standard deviations being used to Review Statistics review 9: One-way analysis of variance Viv Bewick 1 , Liz Cheek 1 and Jonathan Ball 2 1 Senior Lecturer, School of Computing, Mathematical and ... Oxford University Press; 2001. 3. Bewick V, Cheek L, Ball J: Statistics review 7: Correlation and Regression. Crit Care 2003, 7:4 51-459. 4. Le Gall JR, Lemeshow S, Saulnier F: A...

Ngày tải lên: 12/08/2014, 20:20

... dyes and allele calling software possibilities. For instance, the type of fluorescent dye used will influence migration, and moreover, this will depend on the length and sequence of the DNA strand ... gel electrophoresis. 4.2.2. Single strand DNA conformation and heteroduplexes Single strand conformation polymorphism (SSCP) is based on the spe- cificity of folding conformation of single...

Ngày tải lên: 09/08/2014, 18:21

... the sum of all values (X 1 , X 2 ,…, X n ). In other words: Review Statistics review 1: Presenting and summarising data Elise Whitley* and Jonathan Ball † *Lecturer in Medical Statistics, University ... introduces some of these measures. It describes and gives examples of qualitative data (unordered and ordered) and quantitative data (discrete and continuous); how these types...

Ngày tải lên: 12/08/2014, 18:21

Ngày tải lên: 12/08/2014, 19:22

... Rocker GM: Organ and tissue donation in the intensive care unit. CMAJ 2002, 1 67:1 248-1249. 62. Australian and New Zealand Intensive Care Society Recom- mendations on Brain Death and Organ Donation, ... can be discussed with confidence, openness and compassion, and need not be contemplated with a sense of unease. There is a potential that such an understanding might reduce the numb...

Ngày tải lên: 12/08/2014, 20:20

... to medical versus nonmedical criteria and how should the limits and progresses of medical sciences be taken into account. Review Ethics review: Position papers and policies – are they really helpful ... by inappropriate and to develop a decision- making process that consistently and fairly balances medical and nonmedical factors, albeit a tough task, raises concerns of inequity...

Ngày tải lên: 13/08/2014, 03:20

... digoxin [15], and chloroquine [64] poisonings. Peripheral ECLS has been used in combination with an IABP in a case of organophosphate poisoning [50]. Babatasi and colleagues [5] and Massetti and colleagues ... poisonings involving a combination of sotalol and verapamil in one case, acebutolol and meprobamate in two cases, propranolol, verapamil and betaxolol in one case, and v...

Ngày tải lên: 13/08/2014, 03:20