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12 cards from this deck
Most frequently occurring value
Find highest frequency, match to corresponding value
Average value; total sum divided by count
∑(value×frequency)∑frequency\frac{\sum(\text{value} \times \text{frequency})}{\sum\text{frequency}}∑frequency∑(value×frequency)
Middle value when data ordered from smallest to largest
9th value (odd number of values)
lower bound+upper bound2\frac{\text{lower bound} + \text{upper bound}}{2}2lower bound+upper bound
Mid-interval value of highest frequency interval
Mid-interval values, not endpoints
Find interval with middle position, use mid-interval value
Forgetting to multiply each value by its frequency first
Between 15th and 16th values (even number of values)
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