Since, the variance calculated on 34 scores is equal to 14.94.
We have to determine the standard deviation.
Relationship between Variance and standard deviation is:
Standard deviation =
![\sqrt(Variance)](https://img.qammunity.org/2019/formulas/mathematics/college/szogyi5l9k10ztko8n0fyc19ddxlq4mict.png)
Substituting the value of Variance, to evaluate the standard deviation.
We get,
Standard deviation =
![\sqrt(14.94)](https://img.qammunity.org/2019/formulas/mathematics/college/vhjz1nzcfxzvzbn49p32u7ouj6jz00p01m.png)
= 3.865
= 3.87
Therefore, the standard deviation is 3.87