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| as a means of testing a hypothesis |
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never studied or tested
group that provides data |
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characteristics of the population
not generally calculated |
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| used to test inferential statistics |
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Using #'s from sample to make informed guesses about the population parameters
Statistics/Informed guesses ALWAYS have ERROR
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naming the data
numbers have no meaning
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Ordinal/Rank Ordered Data
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numbers matter
measuring more or less
no equal intervals
cannot be averaged |
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able to average
follow equal intervals
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meaningful zero point
Ex. I ate two donuts and you ate 1 so I ate 2x as many donuts as you |
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Placing people into one of two categories
two options means equal interval
Ex. gender male or female |
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numbers can only be whole numbers no decimals
finite number of possibilities |
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Decimals are allowed
time
Ex. I came to class late so I was in class for .98 minutes of class |
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everyone has a chance of being selected
sample must represent population or else curve will be skewed
Ex. can't count landlines bc lots of ppl have only cell phones |
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