Here are the 2013 tuitions (in dollars) of 10 randomly selected 4-year, public colleges:

a. Find the mean tuition.
b. Find the standard deviation of the tuitions.
c. The mean tuition of 10 randomly selected 4-year, private colleges is $20,750. The standard deviation is $10,065. Which sample of colleges has the higher typical tuition, the 10 public colleges or the 10 private colleges? Explain.
d. Which sample of colleges has tuitions with more spread, the 10 public colleges or the 10 private colleges? Explain. See part (c).
e. On the basis of comparing only the standard deviations of the two samples, a student concludes that the tuitions of all 4-year, private colleges have more spread than the tuitions of all 4-year, public colleges. What would you tell the student?

Transcribed Image Text:

7238 8570 2550 4255 6180 6238 9864 7327 8706 3875