AP Statistics

In this video, I walked through the calculations for two probabilities related to our sample mean and parameter mean. For the first probability, I found it to be 9.7%, while the second probability came out to 1.2%. I explained that the probability for part B is less than for part A because our sample mean is lower than the parameter mean, and we divided our standard deviation by the square root of 3, which reduced our answer. I also noted that the likelihood of achieving an average under four seconds in three tries, given a mean of 5.39, seems quite improbable.