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| Teaching Since: | May 2017 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
An agronomist examines the cellulose content of a variety of alfalfa hay. Suppose that the cellulose content in the population has standard deviation ? = 8 milligrams per gram (mg/g). A sample of 15 cuttings has mean cellulose content =145 mg/g.
(a)Â Give a 90% confidence interval for the mean cellulose content in the population.
(b) A previous study claimed that the mean cellulose content was ? = 140 mg/g, but the agronomist believes that the mean is higher than that figure. State H0 and Haand carry out a significance test to see if the new data support this belief.
(c)Â The statistical procedures used in parts (a) and (b) are valid when several assumptions are met. What are these assumptions?
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