Answer the following questions regarding statistics.

1. How are correlations used in the real world? Give an example and explain what type of correlation it is (high/low, positive, negative, no correlation). 2. Why are hypotheses important to research and reviewing research? Why is it important to write the hypotheses prior to analyzing data? What do z scores allow people to do? 3. Give an example of the importance of z scores. 4. What does significance level mean, and why is it important? Explain fully using facts. 5. Discuss why reliability and validity are important to research and statistics. Provide a definition for both.