31) - data collected over the same period(ex each week the...

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Statistics 5e 3/31/08 Statistics: the science of collecting, organizing, analyzing, and interpreting data in order to make a decision in the presence of uncertainty. Types of Data : 1. Qualitative data: data that are labels (categorical data) 2. Quantitative data: numberical values a. Discrete data: can assume only a finite or countable number (ex: # of siblings) b. Continuous data: can be measured or can take any value in an interval (ex: gas prices) Cross-Sectional Data : data collected at the same point in time (ex: ask 10 people a question at the same time) Time-Series Data
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Unformatted text preview: : data collected over the same period (ex: each week, the same day, gas prices) Population : entire group you are interested in. Size of the population is denoted by “N” Sample : a subset of the population that is representative of the population of interest Graphical Summaries: • For qualitative data: pie chart and bar graph o Frequency Distribution: shows the number of data values in each of several non-overlapping classes o Relative Frequency Distribution: proportion of items belonging to a class RF = (frequency) / (# of values)...
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