医学统计学英文课件-DescriptiveStatistic.pptVIP

* Explore The Explore procedure produces summary statistics and graphical displays (including Normality plots with tests). Exploring the data can help to determine whether the statistical techniques you are considering for data analysis are appropriate. * Example: A physician measured the diastolic blood pressure (mmHg) of 120 healthy male adults. How to analyze the data? 82 70 64 75 86 78 72 ...... * Median, Q Mean,S.D., C.V. Frequency distribution Symmetrical (normal distribution)? Yes No Geometric mean * * * * * * * * * * * * * * * * * * * * * Lesson Two Descriptive Statistics * 1. How to make a frequency table? 2. The properties of normal distribution . 3. The calculations of reference range 4. The Descriptive Statistics procedures in SPSS. * The properties of normal distribution and standard normal distribution. . The provided Excel document shows the distributions, when the two parameters change. Discussion: * （a）a specific normal distribution （b）relationship and the standard normal distribution between μ and σ * 2. The mean of RBC in 625 normal males was found to be 4.8×1012/L, variance 0.25 ×1024 /L. Was the RBC 4.0×1012/L normal? * Solution: reference range: (3.82~5.78)×1012 /L * 3. Which of the following is the best parameter to compare the variations between weight and height? CV B. s2 C. R D. s * SPSS Descriptive Statistics To know the basic characteristics of data such as the distribution, central tendency, tendency of dispersion, etc. * Analyze Descriptive Statistics Frequencies... Descriptives... Explore... * Frequencies The Frequencies procedure provides statistics and graphical displays (including frequency table) that are useful for describing the variables. For a brief look at your data, the Frequencies