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18 Cards in this Set
- Front
- Back
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Data
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Data- Collection of observations
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Population
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abbreviated with a "N" complete collection of all possible data
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statistics
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Goal is to make inferences about large group of people by examining the subset of the group- subset must be representative of population, statistics collects, organizes, analyzes data, makes a conclusion
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census
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data from every member of a population, labeled with a small "n"
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parameter
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a numerical measurement describing some characteristic of a population
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statistic
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a statistic is a numerical measurement describing some characteristic of a sample
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example of a parameter
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there are exactly 100 senators in the 109th Congress of the US, and 55% of them are unfortunatly Republican douche bags. The figure of 55% is a parameter because it is based on the entire population of all 100 senators
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example of a statistic
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in 1936 Literary Digest polled 2.3 million adults in the United Stats, and 57% said that they would vote for ALf Landon for presidency. That figure of 57% is a stat because it is based on sa smaple not the entire population
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quantitative data
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consist of numbers representing counts or measurements
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categorial data
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consist of names or labels that are not numbers representing counts or measurements
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discrete data
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result when the number of possible values is either a finite number or a countable number
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continuous data
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result from infinitely many possible values that correspond to some continuous scale that covers a range of values without gaps interruptions or jumps
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nominal level of measurement
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characterized by data that consist of names, labels, or categories only. The data cannot be arranged in an orering scheme
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ordinal level of measurement
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if they can be arranged in some order, but differences (obtained by subtraction) between data values
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ratio
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there is a natural zero starting point and ratios are meaningful
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interval
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differences are meaningful, but there is no natural zero starting point and ratios are meaningless
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ordinal
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categories are ordered, but differences can't be found or are meaningless
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nominal
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categories only. Data cannot be arranged in an ordering scheme
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