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bachelor in business administration
Polytechnic State University Sanluis
Jan-2006 - Nov-2010
CPA
Polytechnic State University
Jan-2012 - Nov-2016
Professor
Harvard Square Academy (HS2)
Mar-2012 - Present
(Continuation of 6.7.2) Using your work from Exercise 6.7.2(a), fill in the blank:“We are 95% confident
that the difference in population means is at least __________ nmol/g.”
Exercise 6.7.2:
Ferulic acid is a compound that may play a role in disease resistance in corn. A botanist measured the concentration of soluble ferulic acid in corn seedlings grown in the dark or in a light/dark photoperiod.The results (nmol acid per gm tissue) were as shown in the table.40
(a) Construct a 95% confidence interval for the difference in ferulic acid concentration under the two
lighting conditions. (Assume that the two populations from which the data came are normally distributed.)
[Note: Formula (6.7.1) yields 6 degrees of freedom for these data.]
(b) Repeat part (a) for a 90% level of confidence.
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