Homework Help is Here – Start Your Trial Now!
Math
Statistics
1.7. Refer to information in 1.6 The one-hectare plot has different types of vegetation - shady areas, sunny areas. The researchers want to establish whether the type of vegetation has an influence on the mean height of the flower. They noticed that the two areas are more or less the same size and the plants were spread evenly over the two areas. Recall the assumption of 1200 plants on this 1hectare plot. The researchers decide to investigate the shady and the sunny areas in order to evaluate the mean heights as well record the number of flowering and non-flowering plants. A sample of 20 plants was taken from the sunny area and a sample of 25 from the shady area. The mean heights were 85 mm and 75 mm respectively and variances, 4 and 6 respectively. The

1.7. Refer to information in 1.6 The one-hectare plot has different types of vegetation - shady areas, sunny areas. The researchers want to establish whether the type of vegetation has an influence on the mean height of the flower. They noticed that the two areas are more or less the same size and the plants were spread evenly over the two areas. Recall the assumption of 1200 plants on this 1hectare plot. The researchers decide to investigate the shady and the sunny areas in order to evaluate the mean heights as well record the number of flowering and non-flowering plants. A sample of 20 plants was taken from the sunny area and a sample of 25 from the shady area. The mean heights were 85 mm and 75 mm respectively and variances, 4 and 6 respectively. The

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question
following steps were undertaken. Show how it applies to this case. Establish that the plot needs to be divided according to vegetation -strata ● Identify the different strata i = 1,2,..., l N₁ Find the weight of each stratum W₂ = N • *** Take a sample from each stratum n₁, №₂, Find the sample mean of each stratum X₁ ,n₂ • = I mi i=1 Xil ni ● Find the variance of each stratum s} = =7₁-1/²/²1 (X ₁₁ - X₁) ² Estimate the stratified mean ø = Σ₁=₁ W₁ X, as estimation of the population mean µ. Estimate the standard error of the stratified mean.
Transcribed Image Text:following steps were undertaken. Show how it applies to this case. Establish that the plot needs to be divided according to vegetation -strata ● Identify the different strata i = 1,2,..., l N₁ Find the weight of each stratum W₂ = N • *** Take a sample from each stratum n₁, №₂, Find the sample mean of each stratum X₁ ,n₂ • = I mi i=1 Xil ni ● Find the variance of each stratum s} = =7₁-1/²/²1 (X ₁₁ - X₁) ² Estimate the stratified mean ø = Σ₁=₁ W₁ X, as estimation of the population mean µ. Estimate the standard error of the stratified mean.
1.7. Refer to information in 1.6 The one-hectare plot has different types of vegetation - shady areas, sunny areas. The researchers want to establish whether the type of vegetation has an influence on the mean height of the flower. They noticed that the two areas are more or less the same size and the plants were spread evenly over the two areas. Recall the assumption of 1200 plants on this 1 hectare plot. The researchers decide to investigate the shady and the sunny areas in order to evaluate the mean heights as well record the number of flowering and non-flowering plants. A sample of 20 plants was taken from the sunny area and a sample of 25 from the shady area. The mean heights were 85 mm and 75 mm respectively and variances, 4 and 6 respectively. The
Transcribed Image Text:1.7. Refer to information in 1.6 The one-hectare plot has different types of vegetation - shady areas, sunny areas. The researchers want to establish whether the type of vegetation has an influence on the mean height of the flower. They noticed that the two areas are more or less the same size and the plants were spread evenly over the two areas. Recall the assumption of 1200 plants on this 1 hectare plot. The researchers decide to investigate the shady and the sunny areas in order to evaluate the mean heights as well record the number of flowering and non-flowering plants. A sample of 20 plants was taken from the sunny area and a sample of 25 from the shady area. The mean heights were 85 mm and 75 mm respectively and variances, 4 and 6 respectively. The
Expert Solution
steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman
SEE MORE TEXTBOOKS