Resource assessment exercises: basic statistics additional exercises

This article is part of the Resource assessment exercises. See the category page for a (chronological) table of contents.

Take a sample of size \(n=100\) from trees and name this sample t.sample. This sample will be used for the exercises.

1. What is the maximum and minimum value for dbh in you sample?
2. Estimate the mean, variance, standard deviation, and coefficient of variation for the variable height.
3. Estimate the standard error of the mean for the variable dbh (without applying the fpc). How wide is the confidence interval when we set \(\alpha=0.01\)?
4. Test whether there is a difference in the estimate of the standard error when you apply the fpc.
5. Estimate the required sample size for a relative standard error of 1%.
6. Estimate the proportion of oak trees. Provide confidence intervals for your estimate.

Related articles

• Previous article: Estimating a proportion
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