A-Level Maths: L3-01 [Data: Finding the Mean from Ungrouped Data]

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Menu no6, 1 variable.
Shift menu setup no 3. Frequency on

lawyerportal
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If one of the readings for x were to be n/a (eg calculations for the Edexcel large data set), do we have to divide the Σx by the n value of that n/a reading?

yimakesiteasy
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hello, wouldn't the formula for grouped data be the sun of the xf values divided by the sum of the frequencies rather than n?

skyeforster