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QMET 251 Tanner Test Questions and Answers Already Passed Latest Update Statistics - Answers a set of procedures (methods) which deal with the collection, organization, analysis, and interpretation of numerical facts/data Descriptive Statistics - Answers describes an existing condition or state of nature and doesn't make predictions Statistical Inference - Answers Involves taking a sample from a population/universe and drawing conclusions abut the characteristics of the population based on the characteristics of the sample that came from that populations Population - Answers every item of interest in any given study Population Symbol - Answers N Census - Answers when data is collected from every item in the population Sample - Answers when data is collected from only part of the population Sample Symbol - Answers n Statistics are - Answers calculations performed on sample data Parameters - Answers calculations performed on population data Measures of Central Tendency examples - Answers mean, median, mode Measures of Central Tendency - Answers measures some central value in a set of data Mean symbol for population - Answers mu Mean symbol for sample - Answers x bar Array - Answers always organize date from smallest to largest Measures of Dispersion - Answers measures the spread of central tendency Outlier - Answers A value much greater or much less than the others in a data set that can cause the mean to be misleading Median - Answers number in organized set of data that cuts the data in half- must be interpreted Median interpretation - Answers half of these students were less than 18 years old Mode - Answers the most frequently occurring numbers in a sample 2 Modes - Answers bimodal There is no Mode when - Answers all numbers are equal Positive skewness - Answers meanmedianmode (left concentration on graph)