Preliminary Preparation (HSC SSCE Mathematics Standard): Flashcards

📚Flashcards
Frequency Tables & Mean, Median, and Mode
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Definition of a frequency table

A systematic way to organise data showing scores and their counts

Three columns in a frequency table

Score, Tally, Frequency

Order of scores in frequency table

Ascending order (smallest to largest)

How to verify a frequency table is correct

Sum of frequencies = total number of data points

Definition of the mean

The arithmetic average of a dataset

Formula for the mean

xˉ=xn\bar{x} = \frac{\sum x}{n}

Definition of the median

The middle value when scores are arranged in order

Finding median with even number of scores

Average of the two middle values

Definition of the mode

The score that appears most frequently

Effect of outliers on the mean

Mean is sensitive to extreme values/outliers

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