I am not quite sure with these questions. Hypothesis Testing and z-Test

THE IQ PILL: DOES IT AFFECT IQ? Say we randomly selected 50 people, gave them an IQ. pill that we predict affects IQ, measured their IQ, and found their mean (X) to be 105 where u = 95 and * = 15 Steps 1. Determine the experimental hypothesis and create the statistical hypothesis Experimental Statistical 2. Set up the sampling distribution. Select oc Locate region of rejection Determine critical value 3. Compute the X and Zobt X - H Zobt = 4. Compare Zobt and Zerit and report whether or not the result is statistically significant.THE IQ PILL: DOES IT AFFECT IQ? Sax.r we randome selected 100 people, gave them an IQpiII that we predict affects IQ, measured their ID. and found their mean [Y] to be 103 where p: 103 and (I, = 12 Steps 1. Determine the experimental hypothesis and ereete the statistical hypothesis Experimental Statistical 2. Set up the sampling distribution. Select 0: Locate region of rejection Determine critical value 3. Compute the X and 2,5. 3? - r-I 20hr - a: 6, Vi= 5. Compare 2.3, and 2m, and report whether or not the result is mtietioelly signicant