Stat 4

Important Terms Population Total set of consequences in which we are interested Histogram Interpretation How many another(prenominal) total students sampled? 60 + 82 + 60 + 41 = 243 Which kinsperson has highest / lowest frequence? What are those frequencies? Highest: 100-109 with 82 Lowest: 120-129 with 41 How many students pee-pee an IQ surrounded by 110 and 129? 60 + 41 = 101 Sample A subset of the population for which we have south Subject Entities we measure (individuals) Stem-And-Leaf Plot A bar map on its side Stem is any digits except the persist one Last digit is the flip over acclivity order No commas If nothing in a row, indite 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 assay out Methods Simple Random Sampling Each subject bothwhere has an every bit likely chance of existence selected Often done with a random number give in Choosing a company some place in the U.S. Systematic Selecting every k-th subject Surveying every tenth person we run into downtown Convenience Individuals are easily found (e.g.

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

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