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Study these flashcards

- Pennsylvania
- Delaware County Community College
- Mathematics
- Mathematics 121
- Kilroy
- Ch. 12 Section 2

Lizy R.

• 14

cards
define mean and symbol

average

(sum of items)/(how many items there are)

x̄ (x bar)

mean equation

x̄ = Σ(x)/n

Σ is sum of numbers

n is number of items

define median and example

middle of the data

ex: 1, 1, 2, 2, 3, 3

middle is 2

how do you find the median?

sort the numbers in order, count to the middle

define mode

occurs most often

define bimodal and example

has 2 modes (2 numbers that occur most often)

ex: 1, 1, 2, 3, 3, 4, 5

2 modes are 1 and 3

define weighted mean and symbol

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weighted mean equation

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weighted mean example

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how do you find the median in a frequency distribution?

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median of frequency distribution example

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how do you find the mode of the frequency distribution?

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how can the median and mode be easily identified?

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stem-and-leaf display

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