1
Q
Why is the mean described as being more powerful?
A
Because it encompasses all the data
2
Q
What does it mean when distribution is symmetric?
A
Mean equals the Median
3
Q
What does the Standard deviation show?
A
How spread out the values are.
Variance is root of SD
4
Q
When can standard deviation and the mean not be used in data?
A
When the distribution is skewed
5
Q
What is used in non-symmetric distribution?
A
Median and IQR
6
Q
How much of the data is included in a ‘normal range’
A
95% data, (Multiply by 1.96 in a calculation)
7
Q
What is needed to work out ND?
A
SD and Mean, therefore can create normal ranges
