Some shrubs have the useful ability to resprout from their roots after their top

Question

Some shrubs have the useful ability to resprout from their roots after their tops are destroyed. Fire is a particular threat to shrubs in dry climates, as it can injure the roots as well as destroy the aboveground material. One study of resprouting took place in a dry area of Mexico. The investigation clipped the tops of samples of several species of shrubs. In some cases, they also applied a propane torch to the stumps to simulate a fire. Of 20 specimens of a particular species, 5 resprouted after fire. Estimate with 99% confidence the proportion of all shrubs of this species that will resprout after fire. Interval:

Explanation / Answer

  Interval: =0.0006 ; 0.4994 ~ 0.00 ; 0.50

                                                                                           x                    =   5 sample size n                    = 20 sample proportion     p x/n= 0.2500 std error       =Se            =(p*(1-p)/n) = 0.0968 for 99 % CI value of z= 2.5758 margin of error E=z*std error                            = 0.249 lower confidence bound=sample proportion-margin of error 0.0006 Upper confidence bound=sample proportion+margin of error 0.4994

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.