Assume trees in a plantation have heights 42 metres with a standard deviation of 20 metres. The plantation is considered

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Assume Trees In A Plantation Have Heights 42 Metres With A Standard Deviation Of 20 Metres The Plantation Is Considered 1 (52.41 KiB) Viewed 31 times

Assume trees in a plantation have heights 42 metres with a standard deviation of 20 metres. The plantation is considered ready for logging if a sample of these trees has a mean height exceeding 38 metres. a) If 60 trees were sampled, what is the chance that the plantation is considered ready for logging, based on the mean height of this sample? 1 (Enter your answer correct to 3 decimal places) b) How many trees should have been sampled in order for the chance of not logging to be only 3.0%? 数字 (Enter your answer correct to the nearest integer) c) What assumptions did you need to make to answer this question? Tick all that apply. None. ✔Trees can be treated as a random sample, with their heights being independent and coming from the same distribution. O Tree heights are approximately normally distributed.