Researchers measured the number of tree species in each of 69 vegetational plots in the Lama Forest of Benin, West Africa.53 The number of species ranged from a low of 1 to a high of 12. The sample mean was 6.8 and the sample SD was 2.4, which results in a 95% confidence interval of (6.2,7.4). However, the number of tree species in a plot takes on only integer values. Does this mean that the confidence interval should be (7, 7)? Or does it mean that we should round off the endpoints of the confidence interval and report it as (6, 7)? Or should the confidence interval really be (6.2,7.4)? Explain.