By most definitions, if the bases are congruent, it is not a trapezoid, it is a parallelogram.
Solution: The sample mean of sample 1 is:

The sample mean of sample 2 is:

The sample mean of sample 3 is:

The sample mean of sample 4 is:

The minimum sample mean of the four sample means is 3.6 and maximum sample mean of the four sample means is 4.4.
Therefore, using his four samples, between 3.6 and 4.4 will Ardem's actual population mean lie.
Hence the option 3.6 and 4.4 is correct
The capacity is the same as the amount because it refers to the amount of what is inside the object. Lets say you have a bag of chips it refers to the amount inside the bag of chips.