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laughs

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basic statistics

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three out of four dentists recommend

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using Brand X toothpaste Most teens need

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eight or nine hours of sleep each night

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the average amount of homework a student

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gets each week and the U.S is a little

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more than 3.5 hours have you ever heard

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different numbers used to give

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information about something if yes then

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you have been listening to the results

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of Statistics statistics is the science

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or practice of collecting and analyzing

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data in large quantities once data is

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collected analyzed and interpreted it

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may be used for many different reasons

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such as weather forecasts medical

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decisions political campaigns Insurance

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and financial decisions consumer goods

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product testing crime reports and many

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more almost everyone uses statistics in

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one way or another sometimes you use

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statistics without ever realizing it for

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example you may decide to download a new

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song Because thousands or millions of

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other people have downloaded the song

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the number of people who have downloaded

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the song is a statistic it has a large

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quantity of data that has been collected

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and you have analyzed it you may have

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interpreted the data as well by saying a

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lot of other people like this so I will

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probably like it too there are several

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important numbers used in basic

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statistics the data set the mean the

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median the mode and the range regardless

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of the data collected every set of

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Statistics usually has a mean median and

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a range and some sets will also include

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a mode

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what are they the term data set includes

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the actual information collected

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analyzed and interpreted by using the

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mean median mode and range all

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statistics begin with the set of data

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usually numbers

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here's an example 10 straight days of

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temperatures in New York City during

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October were 66 68 64 61 70 72 72 68 64

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and 64.

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mean most likely you have heard the word

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average the mean is simply the average

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set of numbers you add the numbers

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together and then divide the result by

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the quantity of numbers for example add

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the temperatures together and then

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divide by 10. 669 divided by 10 equals

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66.9

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66.9 is the mean of the data set

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median the median of a set of data is

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the middle number of a set of data to

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find the median align the data from the

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smallest to the largest

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if the quantity of numbers is even add

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the two middle numbers together and then

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divide by two

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134 divided by 2 equals 67. so 67 is the

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median

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mode the mode for a set of data is the

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number appearing the most if numbers

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appear an equal number of times there

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could be more than one modes if every

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number appears an equal number of times

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then there is no mode

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the mode for a set of data is the number

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appearing the most for example

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use the aligned numbers which number

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appears the most

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if you said 64 you're right 64 appears

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the most so it is the mode

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range the range for a set of data is the

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difference between the lowest and

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highest numbers find the highest number

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and subtract the lowest number

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for example subtract the smallest number

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from the largest number so 72 minus 61

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equals 11. so 11 is the range in summary

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the data set has 10 values its mean is

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66.9 the median is 67. the mode is 64.

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and the range is 11. how can this be

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analyzed the average temperature in New

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York City is nearly 67 degrees

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Fahrenheit in October but sometimes it

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can get a little cooler because the mode

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was lower at 64 degrees Fahrenheit

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here's how to remember the statistical

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terms mean median and mode they all

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begin with the letter M mean is the

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average and takes the longest to solve

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which might make you mean the median has

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the letter D just like the word middle

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and mode begins with Mo just like the

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word most

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what is the most surprising data or

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statistic you have heard in your life

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what was it about

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hope you had fun learning with us visit

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us at learnbrite.org

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for thousands of free resources and

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