The mean number of close friends for the population of people living in the U.S. is 5.7. An investigator predicts that
the mean number of close friends for introverts will be significantly less than the mean of the population. The mean
number of close friends for a sample of 26 introverts is 6.5. The standard deviation of scores in this sample is 1.3. Do
these data support the investigator's prediction? Use an alpha level of .05