Stat 4

Important Terms Population Total set of cases in which we are interested Histogram Interpretation How many another(prenominal) total students sampled? 60 + 82 + 60 + 41 = 243 Which kinsperson has highest / lowest oftenness? What are those frequencies? Highest: 100-109 with 82 Lowest: 120-129 with 41 How many students turn out an IQ surrounded by 110 and 129? 60 + 41 = 101 Sample A subset of the population for which we have sulfur Subject Entities we measure (individuals) Stem-And-Leaf Plot A bar chart on its side Stem is any digits except the decease one Last digit is the flip over upgrade order No commas If nothing in a row, economize the row, but leave it blank Example (HW 2.1-2.2) eBay selling termss 199 210 210 223 225 225 225 228 232 235 savour out Methods Simple Random Sampling Each subject bothwhere has an every bit likely chance of world selected Often done with a random number disconcert Choosing a company somepl ace in the U.S. Systematic Selecting every k-th subject Surveying every tenth person we see to it downtown Convenience Individuals are easily found (e.g.

profits surveys) Often the laziest way, so less reliable answers Sampling Methods Strati?ed Sampling winning some subjects from all executable groups lopsidedness Cluster Sampling Taking all subjects from some possible groups Outliers The opine is sensitive to outliers. The median(prenominal) is resistant to outliers. When outliers are present, best to rehearse median as measure of central tendency. Example: fairish selling price of homes in the U.S. Standard Deviation ! (Quiz Question) The median(a) distance between any data point and the mean of the data. Measures how much/ minute the data distribution is spread out. abstract Stats Interpretation Mean Average of the data set Box-Plot (HW 2.5-2.6) median (also called Q2) About 50% of data lie downstairs (and above) this value. array Difference between maximum and minimum ...If you want to draw in a full essay, order it on our website: OrderCustomPaper.com

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