Data Analyasis
Central Tendancy
Median
Histograms
box plots
Mode
Mean
12345678910 the median is five
Use the median if you are trying to find an average but they have extreme values
To find the median you want to order all the numbers from least to greatest and then find the middle number
123 the mean is two
Use the mean when you are trying to find the average of numbers that have no extreme values
77788899991010 the mode is 9
The moe is used to find what is the most prefered or used of something in a set
The mode is found by ordering pairs from least to greatest and finding what number shows up the most
the first thing you do when doing box plots is order numbers from least to greatest.then you find the median of the data.
the median should divide the data
To find the mean you want to add all the numbers together and then divide by all the numbers in the set
Example
How to do it
On the vertical axis, place frequencies. Label this axis "Frequency".On the horizontal axis, place the lower value of each interval. Draw a bar extending from the lower value of each interval to the lower value of the next interval.
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Statistical questions
To find a statistical question you are gonna have a question that involves finding averages or using numbers to get to the answer of the question
On average, does it rain more in Europe or Africa in a year?
Line plots
A line plot is a graph that show data frequency over a number line. It is made by taking data and finding what is most frequently used or involved.
IQR
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the IQR is the upper quartile subtracted by the lower quartile