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If the average number of textbooks in a professor's offices is 16, the standard deviation is 5 and the average age of professors if 43, with a standard deviation of 8, which data set is more variable, the textbooks or the age? Calculate the coefficient of variation for each and compare.
Using α = 0.05, does this sample provide enough evidence to conclude that the average utility bill in Delaware was lower in the winter of 2011-2012 than it was in the winter of 2010-2011?
Find the expected frequency for the number of days in which there was exactly one application. Determine the expected frequency for the other days in a similar manner.
q1. consider an investment portfolio of 50000 in stock a and 50000 in stock b. the expected value of a is 9.5 and b is
Write the multiple regression equation and what is the coefficient of multiple determination?
a facilities manager at a university reads in a research report that the mean amount of time spent in the shower by an
suppose we select an srs of size n 100 from a large population having proportion p of successes. let p be the
question mara bought some flowers to plant in her garden. when she separated the plants into groups of three or five
Discuss whether this variable should be placed in the model as an ordinary quantitative variable or by means of four 0, 1 indicator variables.
Calculate the 90% confidence interval about μ if sample size, n, is 55. How does increasing sample size affect margin of error, E?
A ski resort collects data on the number of days
odds makers try to predict which professional and college football teams will win and by how much the spread. if the
Calculate the limits within which the weight of the packets should lie assuming that the machine is not been classified as faulty.
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