There is no information following this question this question is just on its own. Please i need assistance

4. A major research study concluded that the mean number of times that adolescents had engaged in vandalism during the previous 12 months was 3.5 times. We believe the true popula- tion mean to be less than this. After collecting our own sample of 29 adolescents, we find that the mean number of times they have vandalized property during a 1-year period was X = 2.9 with a standard deviation equal to .7. Perform all of the procedures