Answer:
Mean of given data is 16.15 and standard deviation is 3.56
Step-by-step explanation:
We have been given a data
We need to find the mean and standard deviation:
mean=
Here sum of observations are 20+16+18+14+9+20+16=113
Number of observations are 7
Substituting the values in the formula for mean we will get
Formula for standard deviation is
x are the values given for the data
n is 7 the number of observations
On substituting the values in the given formula we will get
After simplification we will get
After further simplification we will get
Therefore mean of given data is 16.15 and standard deviation is 3.56