Calculo Diferencial #2

Calculo Diferencial #2

1. Measurement Scales

   • Qualitative:
     • Nominal: identity property of measurement examples: "Male" "Female" and political affilation
       • Ordinal: indentity of magnitude, examples: results of a horse race "win" "place" "show"
   • Quantitative
     • Interval: magnitude and equal intervals: "farenheit scales"
       • Ratio: indentity of magnitude, equal intervals, and minimum value of zero, examples: weight of an object

2. Sampling methods

   • Sample statics:is an estimate , based in a sample data of a population parameter
   • Population parameter: true value of a population atribute
   • Probability samples: each population element hs a known (non-zero) cgance of being chosen for the sample
   • non.probability samples: we don´t know probability of each population element will be chosen
   • Voluntary sample: People who self selected into the survey
   • Convenience sample: people who are easy to reach

3. Visual displays of data:

   • Line Graphs
   • Circle Graphs
   • Bar Graphs
   • Stem and leaf
   • Histogram

4. Measures of Central Tendency

   • Frequency Distribution: n+1/2
   • Weighted mean:
   • Mode: the number that is many times repeated
     • Median: the number that in in the medium of alla
       • Mode: the average of all the datas

5. Measures of dispersion

   • Standard deviation
   • Chevyshev´s teorem

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