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T Top Hat S Sign In or Sign UpICh blackboard.vcu.edu/webapps p?course assessment jd 212981 18course jd 155797 1& content jid 7153208 18s Question Completion Status 3 points QUESTION 2 The average height of Hackbery trees in Virginia was investigated by placing 100 ten-hectare plots randomly on a distribution map of the species in Virginia using a then they measured the height of every Hackberry tree within each of the 10-hectare plots. The average height within the plot was used as the unit measurement. These unit measurements were then used to estimate the average Researchers then found the location of each random plot in the field, and Hackberry trees. is the estimate of height based on 100 plots influenced by sampling error? If a new estimate based on another random sample of 100 was taken, is it skely it would be the exact same estimate of age? How would the sampling eror of the estimate of mean age change if the investigators had used a sample of 500 plots? yes or no) yes or no increase, decrease, stay the same) ere the res randomy smplet (yes or no) For Blank 4 Were the 10-ha plots randomly samplou (yes or no) The researchers took an average of the height of trees within each plot as their unit measurement. Would combining the heights of all of the Hackberry trees from all of the plots be an altemate and equivalent unit measurement? yes or no) What was the reason that the researchers took an average of the height of trees within each plot as their unit measurement, rather than combining into a single sample the height of all the trees from all the plots? What is the population of interest in this study QUESTION 3 3 pointsS Pigment of chicken feathers i pigment production, I. A mother chicken, who is homozygous recessive for gene c, and s regulated by two genes, the gene for feather pigment C, and a gene that inhibits heterozygous for gene I, Inhibition is dominant to uninhibited, pigmented feathers are dominant to un Click Save and Submit to save and submit. Chick Save All Ansvers to save all answers. Save All Answers Save a 20 FS 4) 3Explanation / Answer
Hi, as per our regulation, the first full question is answered.
The estimated height on 100 plots is influenced by sampling error. There are total 100 ten-hectare plotes and randomly some plots were chosen and height was measured. This will give rise to some error in calculation. Random sampling can give fair measure of height but not accurate.
No. Another random population would give a fair estimate , but it will not be exactly same.
If they had used 500 plots, the sampling error would have decreased due to increase in number of samples.
Yes, the trees were randonly sampled.
Yes combining heights from all the trees from all the plots will give accurate measure.
The random sampling helps to remove the outliers in the height , it helps to average out height of all the plants without checking with each. Checking height of each tree is cumbersome and time consuming.
The study was about the Hackberry tree population in Virginia.
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