Hello Everybody! Welcome back from Spring Break!
Today in math we started by doing Mental Math.
We started the next Unit which is: Variability and Statistical Analysis.
We are leaning Standard Deviation.
We were then asked how many kms we live from the school, rounded to the nearest km.With this data we made a table in Excel, and we found out the mean distance is 16.5km. We then found the difference from the mean, and you were either positive or negative depending on if you lived inside or outside the mean area (positive if you are outside, negative if you were inside). We then found the mean differences squared, we found that all the numbers were positive.
We then found the sum of the differences squared, then we divided this number by how many people there were that gave data, then we found out the standard deviation.
Standard Deviation is measuring "spread", closeness from the middle or average, and if every number is the same there is no deviation.
Today in math we started by doing Mental Math.
We started the next Unit which is: Variability and Statistical Analysis.
We are leaning Standard Deviation.
We were then asked how many kms we live from the school, rounded to the nearest km.With this data we made a table in Excel, and we found out the mean distance is 16.5km. We then found the difference from the mean, and you were either positive or negative depending on if you lived inside or outside the mean area (positive if you are outside, negative if you were inside). We then found the mean differences squared, we found that all the numbers were positive.
We then found the sum of the differences squared, then we divided this number by how many people there were that gave data, then we found out the standard deviation.
Standard Deviation is measuring "spread", closeness from the middle or average, and if every number is the same there is no deviation.
To calculate Standard Deviation on your calculator you:
PUT THE DATA INTO A LIST, PRESS STAT, THEN CALC, THEN PRESS ENTER TO TAKE 1 VAR-STAT TO YOUR HOME SCREEN, THEN AT THE HOME SCREEN PRESS SECOND, THEN THE NUMBER DEPENDING ON YOUR WHAT NUMBER YOUR LIST IS, FOR EXAMPLE YOU DATA IS IN LIST ONE THEN PRESS SECOND, 1. L1 WILL APPEAR, PRESS ENTER.
There are 11 symbols we are supposed to look up for tomorrow. These are the symbols that appear when you enter a Standard Deviation equation into your calculator.
There are 11 symbols we are supposed to look up for tomorrow. These are the symbols that appear when you enter a Standard Deviation equation into your calculator.
This was actually very helpful. Good post, Amanda!
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