Modeling With Data : Modeling With Data The Mean
Mean : Mean How do we calculate the mean of a given set of data?
Mean is one of the central tendencies. You must decide which measure of central tendencies best describes a set of data.
Mean equals sum of the data items/total number of data items.
Use the mean to describe the middle of a set of data that does not have an outlier.
An outlier is a data value, which is much higher or lower than the other data value in the set.
The mean is referred to as the average.
Finding the Mean : Finding the Mean 15,15,15,15,15,15,15,25,25,25,25,25,30,30,30,45,145 The data represents the amount of money a class of students spent on CD’s each month. Use the data to determine the mean of money spent monthly on CD’s by students in this class.
Finding the Mean : Finding the Mean Step1 - add the amounts 15,15,15,15,15,15,15,25,25,25,25,25,30,30,30,45,145= 510 dollars
Step 2- divide the total by the number of amounts
510/17= 30
The mean amount each students spends on CD’s is 30 dollars
Finding the Mean : Finding the Mean You are now ready to try a few on your own!
Good Luck!