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Dutch elm disease is a common disease caused by fungi. Recently a random sample of 50 trees was taken in voyagers National park to determine
Dutch elm disease is a common disease caused by fungi. Recently a random sample of 50 trees was taken in voyagers National park to determine the proportion of infected trees in the park (p hat). Assume the unknown population proportion or percentage of infected trees is p= 0.14. Use this information for both parts Part one: what is the probability that the sample proportion is more than 0.2? Part 2: is it appropriate to assume that the distribution of the sample proportion of infected trees in the park is normal? A. Yes because n=42 is larger than 30. B. Yes because np(hat) and n(1-p hat) are both least than 10. C. No because np(hat) and n(1-p hat) are both at least 10. D. Yes because np and n(1-p) are both at least 10 E. No because np and n(1-p) are both at least 10
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