Dataset I: a) The median of Dataset I is: \begin{tabular}{|l|l|l|l|l|} \hline 90 & 100 & 110 & 120 & 130 \\ \hline \end{tabular} b) The IQR of Dataset I is from to c) The mean of Dataset I is: d) The standard deviation of Dataset I is:

Step 1 ：The question asks for the median of the dataset. The median is the middle value of a set of numbers. In this case, the dataset is already sorted in ascending order, so the median is the middle number. Since there are 5 numbers, the median is the third number.

Step 2 ：Final Answer: The median of Dataset I is \(\boxed{110}\).