Ch13

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Chapter 13 Data Analysis and Probability

 Probability -**Experimental**, **Theoretical**. **Theoretical**- Simple, Compound.  Simple -Favorable over Total.   Compound -** Or **, ** And. ** ** Or **-Mutually exclusive events P(A)+P(B), Overlapping Events P(A)+P(B)-P(A&B). ** And **-Independent events P(A)*P(B), Dependent Events P(A)*P(B given A). **Odds **-Odds in favor Favorable over Unfavorable, Odds against Unfavorable over favorable.

** Probability **-// The measure of the likelihood, or chance, that the event will occur. //

//This includes (but is not limited to) mean, median, and mode. // ** Mean ** // is the average of a set of data // found by adding the data together and then dividing by how much data there is. If we have 12,8,10, we add these together and get 30. We then divide 30 by 3 to get our mean, or average, 10. ** Median ** // is the number in the middle of the data when ordered from least to greatest //or vice versa. <span style="font-family: Arial,Helvetica,sans-serif;">In the sequence 6,12,22,45,67, 22 is our median because it is in the middle spot of the sequence. <span style="font-family: Arial,Helvetica,sans-serif;">If, however, we end up with an even number of numbers in the sequence, you pick the middle of the two numbers in the middle. If its 8 and 10, 9 would be the median. It can go into the decimals. <span style="font-family: Arial,Helvetica,sans-serif;">** Mode ** // is the number that appears the most in a set of data //. It is also by far the easiest. <span style="font-family: Arial,Helvetica,sans-serif;">2,5,1,5,3, 5 is our mode because it appears more often than any other number. <span style="font-family: Arial,Helvetica,sans-serif;">If every number appears the same amount of times, or two numbers are tied, there is not a mode in that set of data. <span style="font-family: Arial,Helvetica,sans-serif;">** Lower Extreme ** // is the lowest number // in the set of data. <span style="font-family: Arial,Helvetica,sans-serif;">** Quartile 1 **<span style="color: #040101; font-family: Arial,Helvetica,sans-serif;"> is // the median of the lower half, // at 25%. <span style="font-family: Arial,Helvetica,sans-serif;"> **Quartile 2** is also the median, // at 50% of the data. // <span style="font-family: Arial,Helvetica,sans-serif;"> **Quartile 3** is // the median of the upper half //, at 75%. <span style="font-family: Arial,Helvetica,sans-serif;">** Upper Extreme **// is the highest number in the set of data. // <span style="font-family: Arial,Helvetica,sans-serif;"> **Range** // is the distance between the two extremes. // <span style="font-family: Arial,Helvetica,sans-serif;">** Interquartile Range ** // is the distance between quartile 1 & 2. //
 * <span style="color: #e81111; font-family: Arial,Helvetica,sans-serif;">Measures of Central Tendency **