Question

The same survey that was described in the previous problem was also given in 2011 to 90 completely different random students. In 2011 the mean number of days per week that students lifted weights was 3.09 days with the same standard deviation of 2.56 days. Recall that in the 2013 survey the mean was 2.78 days with a standard deviation of 2.56 days. Conduct a two-sample hypothesis test to determine whether, using a 5% confidence level, the mean number of days lifting weights in 2013 is different than the mean number of days lifting weights in 2011. Make sure to give your conclusion as a complete sentence and in context.  

Answer 1