Statistics - Steelton-Highspire High School
Statistics 1.2 Data ClassificationLEQ: How can you tell the difference between qualitative and quantitative data?Procedure:Types of Data:Definition 1: ______________________ consists of attributes, labels, or non-numerical entries.Definition 2: ___________________________ consist of numerical measurements or counts.Example 1: Determine whether that data are qualitative or quantitative.The telephone numbers in a telephone directory. (#7)The scores of a class on an accounting exam. (#9)Levels of Measurement:Definition 3: Data at the ___________________________________ are qualitative only. Data at this level are categorized using names, labels, or qualities. No mathematical computations can be made at this level.Definition 4: Data at the ___________________________________ are qualitative or quantitative. Data at this level can be arranged in order, but differences between data entries are not meaningful.Definition 5: Data at the _________________________________ are quantitative. The data can be ordered, and you can calculate meaningful differences between data entries. At the interval level, a zero entry simply represents a position on a scale; the entry is not an inherent zero.Definition 6: Data at the ____________________________________ are similar to data at the interval level, with the added property that a zero entry is an inherent zero. A ratio of two data values can be formed so one data value can be expressed as a multiple of another.Definition 7: An _____________________ is a zero that implies “none”. For instance, the amount of money you have in a savings account could be zero dollars. In this case, the zero represents no money; it is an inherent zero. On the other hand, a temperature of 0°C does not represent a condition in which no heat is present. The 0°C temperature is simply a position on the Celsius scale; it is not an inherent zero.Example 2: Identify the data set’s level of measurement. Explain your reasoning.The top five teams in the final college football poll released on January 4, 2004 are listed. (#11)USC 2. LSU 3. Oklahoma 4. Ohio 5. MiamiThe region representing the top salesperson in a corporation for the past six years is given. (#13)SoutheastNorthwestNorthwestSoutheastSouthwestSouthwestThe lengths (in inches) of a sample of striped bass caught in Maryland waters are listed. (#14)16 17.25 19 18.75 21 20.3 19.8 24 21.82Level of measurementPut data in categoriesArrange data in orderSubtract data valuesDetermine if one data value is a multiple of anotherNominalOrdinalIntervalRatioExample of a Data SetMeaningful CalculationsNominal Level(Qualitative data)Ordinal Level(Qualitative or quantitative data)Interval Level(Quantitative data)Ratio Level(Quantitative data)HW: p. 13 (1 – 22 all); Case Study: p. 15 (1 – 8) ................
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