Points: 0 of 1 Dora likes to explore. Recently, she explored southeast Australia where she found some very large trees known as Eucalyptus regnans or Mountain Ash. She wondered if they were taller, on average, than the coastal Douglas Firs of her native state of Oregon in the United States, which have an average height of 250 feet in old growth areas. Dora measured the heights of 15 Mountain Ash trees in southeast Australia and found an average height of these trees of 293 feet. Suppose s = 25 feet. Assume the heights of the 15 trees in Dora's sample are representative of the heights of all Mountain Ash trees in southeast Australia. The t-statistic for this problem is 6.661. Based on this t-statistic, what is the conclusion? Choose the correct answer below. O A. There is sufficient evidence to indicate that the average height of the Mountain Ash trees in this sample is more than 250 feet. O B. There is sufficient evidence to indicate that the average height of all Mountain Ash trees in southeast Australia is equal to 250 feet. O C. There is sufficient evidence to indicate that the average height of all Mountain Ash trees in southeast Australia is more than 250 feet. O D. There is not sufficient evidence to indicate that the average height of the Mountain Ash trees in this sample is more than 250 feet. /1) O E. There is not sufficient evidence to indicate that the average height of all Mountain Ash trees in southeast Australia is more than 250 feet