Mathematics, 19.10.2020 20:01 aharvitt0417
The concentration of carbon dioxide (CO2) in the atmosphere is increasing rapidly due to our use of fossil fuels. Because plants use CO2 to fuel photosynthesis, more CO2 may cause trees and other plants to grow faster. An elaborate apparatus allows researchers to pipe extra CO2 to a 30-meter circle of forest. They selected two nearby circles in each of three parts of a pine forest and randomly chose one of each pair to receive extra CO2. The response variable is the mean increase in base area for 30 to 40 trees in a circle during a growing season. We measure this in percent increase per year. Here are one year's data.
Pair Control plot Treated plot
1 9.728 10.748
2 7.276 8.332
3 5.612 6.632
Required:
a. State the null and alternative hypotheses.
b. Explain clearly why the investigators used a one-sided alternative.
1. The researchers have no preconceived idea what extra CO2 will do to the growth rate.
2. The researchers have reason to believe that CO2 will decrease growth rate.
3. The researchers have reason to believe that CO2 will increase growth rate.
c. Carry out a test and report your conclusion in simple language.
Answers: 1
Mathematics, 21.06.2019 15:30
Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?
Answers: 1
Mathematics, 21.06.2019 20:00
Given ab and cb are tangents of p, and m =10°. what is the measure of abp?
Answers: 3
Mathematics, 21.06.2019 21:30
Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.
Answers: 3
The concentration of carbon dioxide (CO2) in the atmosphere is increasing rapidly due to our use of...
Mathematics, 27.09.2019 20:10
Geography, 27.09.2019 20:10
Computers and Technology, 27.09.2019 20:10
Computers and Technology, 27.09.2019 20:10
Computers and Technology, 27.09.2019 20:10
Computers and Technology, 27.09.2019 20:10
Computers and Technology, 27.09.2019 20:10
Computers and Technology, 27.09.2019 20:10
Computers and Technology, 27.09.2019 20:10
Computers and Technology, 27.09.2019 20:10