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3 cards from this section. Quick, good the night before a test.
What does the term 'assumed mean' refer to in the context of the indirect method?
Think about how we pick a number that's central to our data range.
How is the total frequency calculated?
Remember, it's simply adding the counts together.
What does the formula for the indirect method calculate?
Recall that we're looking for an average with grouped data.
Is it true that the indirect method can be used for both equal and unequal class intervals?
Think about the flexibility of the method.
You are given class midpoints [50, 60, 70] with frequencies [4, 6, 10]. If the assumed mean is 65, calculate the mean using the indirect method.
Calculate each \\(fd\\) value first and sum them up.
For a grouped data set with classes [10-20, 20-30, 30-40] having frequencies [1, 3, 1], if you assume a mean of 25, compute the final mean.
First, identify the deviations, then proceed to find \\(fd\\).
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