A researcher suggests that small doses of hyaluronic acid (HA) will promote the uptake of water in human skin, thus reducing symptoms of dryness and dehydration. He suggests that HA hinds to war and prevents it from evaporating off of the skin. The researcher creates a skin cream formulated HA and compares the skin of 100 people before and after use of the cream. Formulare me null (H_{n}) and one alternative (H_{1}) hypothesis. Describe the data you would expect to see that would support dhe null hypothesis.