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2 cards from this section. Quick, good the night before a test.
Define 'assumed mean'.
Think about what we subtract in the coding process.
What do we call the process of reducing observation values?
It involves subtracting a constant from the original numbers.
What does the indirect method help to do?
Think about why we would use coding.
True or False: The mean calculated by the indirect method will differ from that calculated by the direct method.
Think about the relationship between methods.
A manufacturer records daily outputs over 15 days. The outputs are [730, 760, 810, 780, 800, 890, 850, 900, 950, 900, 840, 790, 800, 750, 720]. If the assumed mean is 800, calculate the mean using the indirect method.
Start by subtracting the assumed mean from each output.
A researcher compares temperature recordings in two different cities over a month. City A has recorded temperatures of [23, 25, 24, 22, 20, 26, 28] and City B has [18, 19, 17, 20, 21, 22, 23]. If the assumed mean is 20 for both cities, find the mean temperature using the indirect method.
Consider how coding simplifies tracking temperature changes.
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