The mean annual tuition and fees for a sample of 11 private colleges was $34,100 with a standard deviation of $5400 A dotplot shows that it is reasonable to assume that the population is approximately normal. You wish to test whether the mean tuition and fees for private colleges is different from $35,700.The mean annual tuition and fees for a sample of 11 private colleges was $34,100 with a standard deviation of $5400 A dotplot shows that it is reasonable to assume that the population is approximately normal. You wish to test whether the mean tuition and fees for private colleges is different from $35,700.