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Statistics

Math terms

TermDefinition
Mean Average of data. add all values together then divide by the number of data points.
Median middle data value. order the values least to greatest then find the middle value.
Mode the value that occurs most often. there can be 1 mode, no mode, or many modes.
Range The differance between the biggest Value and the lowest value
Inter quartile Represents the difference between the third quartile and the first quartile.
outlier A outlier is a data points that varies significantly from the rest of the data. Either the greatest number or the lowest number.
skewed left long tail pointing to the left
skewed right long tail pointing to the right
symmetrical perfectly symmetrical like two half's or a mirror BUT DOSE NOT HAVE TO BE PERFECTLY SYMMETRICAL
bi-modal two modes or humps so two bumps
uniform when all the data is all the same or flat NO MODE considered symmetrical
Mean average deviation (MAD) How spread out a set of data is. to find it find each numbers difference from the mean, add then divide by number of data .
sample size Describes the number of data points collected in a sample ( I choose 50 out of 100 students) sample size is 50
probability The likely hood that an event will happen can be a number value or probability
impossible Likely hood is impossible ( it will never happen) ) 0
certain Likely hood that something WILL happen like your certain your get a red or black card from a deck. 1
equally probable/equally likely When there is an equal chance of some thing/ when there are two half's ( a coin will land on heads that's equal probability.
unlikely Falls between 0-1/2 and means that something in less likely to happen than likely
likely Falls between 1/2-1 and means it has a really good chance of getting it like 1-10 on a wheel of 12 is likely to happen
quartile 1 left side median from the middle
quartile 3 Right side median from the middle
Complement The opposite of the event includes all outcomes that are not a part of the original event.
Created by: user-1970485
 

 



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