Practice

Read and answer the questions below using the space provided.

1. Are teenagers better at geometry than adults? Formulate one null ([tex]\(H_0\)[/tex]) and one alternative ([tex]\(H_1\)[/tex]) hypothesis.

2. Does ivy grow better in areas with more sun versus in shady areas? Formulate one null ([tex]\(H_0\)[/tex]) and one alternative ([tex]\(H_1\)[/tex]) hypothesis.

3. A group of students are interested in examining the potential effects of caffeine (from soda) on heart rate. One group of students hypothesizes that soda consumption will not have an effect on heart rate, while another group proposes an alternative hypothesis that soda consumption will increase heart rate. What data would be expected if the alternative hypothesis was supported?

4. 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 binds to water and prevents it from evaporating off the skin. The researcher creates a skin cream formulated with HA and compares the skin of 100 people before and after use of the cream. Formulate one null ([tex]\(H_0\)[/tex]) and one alternative ([tex]\(H_1\)[/tex]) hypothesis.