Suppose you have a tree farm and you have 1000 live oaks on this farm. You are wondering if this would be a profitable time to harvest the tallest ones - those over 55 feet tall. Your sample of 100 of them indicates that their average height is 45 feet and that the standard deviation (s) of their heights is 5 feet. How many trees in your farm to you predict will have a height greater than 55 feet? (For this answer you do not need to provide a written explanation - simply provide the final answer and show enough of your work to earn part credit if your final answer is wrong. If you can simply provide a written explanation of your math that will be acceptable too.)

Question

Rolex

2 February, 12:57

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Answers (1)

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Alexis Burns · Answer 1

t score = (score - mean) / standard deviation

t score = (55-45) / 5 = 10/5 = 2

p (t>2) at 99 df = 0.02412

number of trees = 0.02412 * 1000 = 24