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17 Cards in this Set
- Front
- Back
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mean
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average
"The mean old teacher gave me a mean old average!" |
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median
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middle
Put the #s in order 1st! If you have an odd # of numbers, it's the one in the middle. If you have an even# of numbers, it's the average of the 2 in the middle |
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mode
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most
The number or numbers that are repeated the most. You can have more than 1 mode. |
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range
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the difference between the high and the low values
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measure of central tendency
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mean, median, or mode.
Range is not a measure of central tendency! |
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independent event
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something which is not affected by the previous event
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dependent event
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something which is affected by the previous event.
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example of independent event
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example: tossing a coin over & over. The 1st outcome doesn't affect the 2nd outcome, etc.
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example of dependent event
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example: picking a M&M out of a bowl of M&M's & recording the color before eating it. The next outcome will be affected by the fact that you ate part of the sample!
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The odds of tossing a head
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1/2 or 50%
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The odds of rolling a 6 on a die
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1/6 or about 16.7%
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The odds of rolling an even # on a die
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1/2 or 50%
half of the numbers are even(2,4,6) so 3/6 = 1/2 or 50% |
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The odds of tossing a head on a coin & rolling a 2 on a die
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1/2 times 1/6 or 1/12
Take the 1st event & multiply it by the 2nd event |
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combinations
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The number of ways an event could happen
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How many combinations will there be for 2 people to sit in 2 chairs?
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2 x 1 or 2 combinations
Take the original number. Put it in the 1st chair, take that person out, so the 2nd number is 1 less, multiply the 2 #s together person a, person b or person b, person a |
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How many combinations will there be for 3 people to sit in 3 chairs?
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3 x 2 x 1 or 6 combinations
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How many combinations will there be for 3 people to sit in 2 chairs?
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3 X 2 or 6 combinations. There will be 1 person left standing all the time though!
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