Dr. Lebon would like to determine whether an over-the-counter cold medication has a negative effect on mental alertness. A sample of n=16 participants is obtained, and each person is given a standard dose of the medication one hour before being tested in a driving simulation task. For the general population, scores on the simulation task are normally distributed with u (population mean symbol)= 16 and o(standard deviation)=8. The individuals in the sample had an average score of M=56.5. What is the null and research hypothesis? What conclusions can Dr.LeBon draw from the data she has collected? Use a two tailed test with a=.05. Compure Cohen's d to measure the size of the effect.What is the correct interpretation of an effect size of this magnitude?