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2103-CHAP 2-CLASS NOTES SEPT 8, 13, 15, 17, 20, 22 2010

# 2103-CHAP 2-CLASS NOTES SEPT 8, 13, 15, 17, 20, 22 2010 -...

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Chapter 2 Methods for Describing Sets of Data (Section #s: 2.1-2.8) 2.1Describing Qualitative Data Bar Charts are Pref'd Graphical Methods, Pie Charts (not favored, b/c misleading), 2.2Graphical Methods for Describing Quantitative Data Frequency Distribution and Histogram Classes (class intervals), Class Frequency (F), Relative Freq Relative Cumulative Freq, Ogive, Percentile Rank, Ranges of Not Emphasized: Dot Plots, Stem & Leaf Plots(omit), Histogram using Frequency Distributions with Class Relativ 2.3Summation Notation (we'll go over what you need in class) 2.4Numerical Measures of Central Tendency Mean Median Mode Shapes of Distributions, and relative positions of Mean, Mdn 2.5Numerical Measures of Variability (i.e., Spread, Dispersion) Range Standard Deviation & Variance Interquartile Range 2.6Interpreting (Applying) the Standard Deviation The Empirical Rule Omit: Chebyshev's Rule 2.7Numerical Measures of Relative Standing Percentile Ranks,

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Using Empirical Rule to approximate percentile ranks of cert 2.8Methods of Outlier Detection Box Plots Z Scores, and the SDEV method for Outlier Detection IQR Method for outlier Detection 2.9Omit 2.1Omit
, quency(RF), Cumulative Freq(CF), f Percentile Rank ve Frequency (Rel F.) n, Mo based on Shape

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tain distances from Mean
Happy Birthday Alissa Napilatano! And to everyone else in cla Marc's new salutation, is, "Good morning Marc" Marc's Hours; Monday 10:30 to noon; Friday Noon to 1:30; Spe Exam One Review Session: Monday Oct 4, 3:00 to 4:30 in Spea read the syllabus for details of Extra Credit for attending Marc's Pred: before and after class MWF, Spk 347, 3rd floor, and by ap Chapter 2 Methods for Describing Sets of Data (Section #s: 2.1-2.8) 2.1Describing Qualitative (non-numeric, categorical, nominal) Data Bar Charts are Pref'd Graphical Methods, Pie Charts (not favored, b/c misleading), 2.2Graphical Methods for Describing Quantitative (Numeric) Data Frequency Distribution and Histogram Classes (class intervals), Class Frequency (F), Relative Freque Relative Cumulative Freq, Ogive, Percentile Rank, Ranges of P Not Emphasized: Dot Plots, Stem & Leaf Plots(omit), Histogram using Frequency Distributions with Class Relative F 2.3Summation Notation (we'll go over what you need in class) 2.4Numerical Measures of Central Tendency Mean The Arithmetic Average, Sum of all values, divided by

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Mean: Based on the "sum" of all numeric values; the value of e observation affects the value of the mean Neither Median, Nor Mode are based on "summation" Also, Mean is especially affected by extreme values at Median Not based on summation, but on "locatio Place values in ascending order, and fin L= (n+1).50 = Position of Median Median is P50, also Q2, in ANY distribution, whether s In contrast, Mean and Mode are NOT alw Median is NOT at all responsive to values at ends of di Either the Middle Value, or, take middle 2 Mode the most frequently occuring value (Mode for Most) But, there may be more than one Mode, Bi-Modal distr Or, what if no value appears more than once?
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2103-CHAP 2-CLASS NOTES SEPT 8, 13, 15, 17, 20, 22 2010 -...

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