Answer:
New jersey plan is a proposal that is intended to increase the power of smaller states in the creation of national legislature.
At that time, New Jersey plan was made in response of the Virginia Plan.
Virginia plan proposed that the number of population in each states should influence the number of votes that the states have within the creation of national legislature. More population = more votes. This will be a disadvantage for smaller states who do not have much population.
The New Jersey plan on the other hand, proposed that all states should have equal amount of votes regardless of their total population. This will give smaller states an advantage over the bigger states.