In this project we’ve collected the data from Yooheng’s resident electricity usage by looking at the electricity meter of each room (with a permission from the place’s owner of course) and compare the electricity usage to the electricity rate which would be 7 baht per kWh then we can get the exact amount of electricity bill of each room.
Our group uses the said method to collect the data monthly so that we can compare the usage month by month. The months we choose to collect the data are March, August, and December.
We use the frequency distribution table to show the range of electricity usage of the Yooheng’s resident by percentage, which is calculated using this formula:
x_i=class mark= ((lower "lim " it+upper "lim " it )/2)
Then, the formula x ̅=
We use a line chart to graphically illustrate the data, and finally, a descriptive statistic table which included the Mean, Mode, Median, Variance, and SD to summarize the data that we’ve collected thus far.