I mainly have 2 queries:
1) I want to know if there are any standard datasets available who have single feature variable?
2) In these types of datasets, can there be some data points having same values for feature variable but a slight variation in target variable?
For exmaple, following table (X = feature variable and Y = target variable):
X | Y
1 | 2.345
1 | 2.3
2 | 3.76
2 | 3.7
3 | 4
4 | 5.56
4 | 5.57
Kindly let me know a few of them.