How badly does logging damage tropical rain forests? One study compared forest plots in Borneo that had never been logged with similar plots nearby that had been logged 8 years earlier. The study found that the effects of logging were somewhat less severe than expected. Here are the data on the number of tree species in 12 unlogged plots and 9 logged plots. Unlogged: 17 16 16 14 14 19 15 22 18 14 16 13 Logged: 4 15 14 11 10 12 15 10 13 (a) Does logging significantly reduce the mean number of species in a plot after 8 years? Give appropriate statistical evidence to support your conclusion. (Use a = .05 and conservative degrees of freedom.) Ho: HU -Select- V L二 Hạ: HU -Select-- V Aフ t=今39 P-value = 0.002 Conclusion There is significant evidence that logging reduces the mean number of species in a plot after 8 years. O There is no evidence that logging significantly reduces the mean number of species in a plot after 8 years. (b) Give a 95% confidence interval for the difference in mean number of species between unlogged and logged plots. D.157 upper bound LiO63 lower bound

How badly does logging damage tropical rain forests? One study compared forest plots in Borneo that had never been logged with similar plots nearby that had been logged 8 years earlier. The study found that the effects of logging were somewhat less severe than expected. Here are the data on the number of tree species in 12 unlogged plots and 9 logged plots. Unlogged: 17 16 16 14 14 19 15 22 18 14 16 13 Logged: 4 15 14 11 10 12 15 10 13 (a) Does logging significantly reduce the mean number of species in a plot after 8 years? Give appropriate statistical evidence to support your conclusion. (Use a = .05 and conservative degrees of freedom.) Ho: HU -Select- V L二 Hạ: HU -Select-- V Aフ t=今39 P-value = 0.002 Conclusion There is significant evidence that logging reduces the mean number of species in a plot after 8 years. O There is no evidence that logging significantly reduces the mean number of species in a plot after 8 years. (b) Give a 95% confidence interval for the difference in mean number of species between unlogged and logged plots. D.157 upper bound LiO63 lower bound

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.

Question

100%

Just solve b) the confidence interval for the attached question

How badly does logging damage tropical rain forests? One study compared forest plots in Borneo that had never been
logged with similar plots nearby that had been logged 8 years earlier. The study found that the effects of logging were
somewhat less severe than expected. Here are the data on the number of tree species in 12 unlogged plots and 9 logged
plots.
Unlogged: 17 16 16 14 14 19 15 22 18 14 16 13
Logged:
4 15 14 11 1012 15 10 13
(a) Does logging significantly reduce the mean number of species in a plot after 8 years? Give appropriate
statistical evidence to support your conclusion. (Use a = .05 and conservative degrees of freedom.)
Ho: HU -Select---
く二
Ha: Hu -Select---
くAフ
t = 3.39
0.002
%3D
P-value =
%3D
Conclusion
There is significant evidence that logging reduces the mean number of species in a plot after 8 years.
O There is no evidence that logging significantly reduces the mean number of species in a plot after 8
years.
(b) Give a 95% confidence interval for the difference in mean number of species between unlogged and logged
plots.
D.157
1.063
lower bound
upper bound

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