![8.1 Confidence Intervals about a Population Mean](http://s1.studyres.com/store/data/000524061_1-cf613ebe05c8ac1befd2e20b9567d9e8-300x300.png)
Measures of Variability
... • Although the range is quick-and-easy, it is DEPENDENT only on two scores (the highest and lowest), thus it shows inaccurate data. Example: Prof A: 18, 18, 19, 19, 20, 20, 22 and 23 Prof B: 18, 18, 19, 19, 20, 21 and 43 Thus scores are only affected only by ONE student. ...
... • Although the range is quick-and-easy, it is DEPENDENT only on two scores (the highest and lowest), thus it shows inaccurate data. Example: Prof A: 18, 18, 19, 19, 20, 20, 22 and 23 Prof B: 18, 18, 19, 19, 20, 21 and 43 Thus scores are only affected only by ONE student. ...
APSTAT PART ONE Exploring and Understanding Data
... z s m = population mean s = population standard deviation, X = Raw-Score, z = z-Score Normal Distribution Notation N (m , s) ...
... z s m = population mean s = population standard deviation, X = Raw-Score, z = z-Score Normal Distribution Notation N (m , s) ...
S-1: DESCRIPTIVE STATISTICS All educators are involved in
... parameters, while lower case Roman letters are used to symbolize statistics. In the examples given, the raw scores for the 10 pt. quiz are: ...
... parameters, while lower case Roman letters are used to symbolize statistics. In the examples given, the raw scores for the 10 pt. quiz are: ...
Statistical Inference and Confidence Intervals
... • 68% of data are within ± 1 S.D. of the mean • 95% of data are within ± 2 S.D. of the mean • 99% of data are within ± 3 S.D. of the mean ...
... • 68% of data are within ± 1 S.D. of the mean • 95% of data are within ± 2 S.D. of the mean • 99% of data are within ± 3 S.D. of the mean ...