Data Set:
We ask five people how many hours of cellphones they use in a week.
Mean
Mean is finding the average of the given numbers.
Hence, on average 12 hours, they use their cellphones a week.
Median
Midpoint of the data
- Sort the data from the smallest to the largest
- Choose the value in the middle.
The above-rounded value is the median! Which is 7 .
Standard Deviation
Standard Deviation (SD), tells us the spread of data
- It describes the data measure dispersion
- Standard Deviation (SD) measures the spread from the mean
We already know the mean value for the given dataset.
Hence, mean = 12.
As we know, Standard Deviation (SD) tells us, how data is spread from the mean.
- Low SD means data are clustered around the mean
- High SD means indicates data are more spread out!