Compare and interpret the measures to select the data with the least variation.
Dataset C has a standard deviation of 1.2 and a mean of 25.
Dataset D has a standard deviation of 1.14 and a mean of 48.
Dataset A has a standard deviation of 1.9 and a mean of 21.
Dataset B has a standard deviation of 1.41 and a mean of 29.
In this case, Dataset D has the smallest standard deviation of 1.14, which indicates that the data points are clustered closer to the mean of 48 compared to the other datasets. This means that Dataset D has the least variation among the four datasets.
On the other hand, Dataset A has the largest standard deviation of 1.9, indicating that the data points are more spread out from the mean of 21. Therefore, Dataset A has the highest variation among the four datasets.
In summary, if we want to select the data with the least variation, Dataset D would be the best choice.