Under the null hypothesis what is the expected number of, Ask an Expert

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A software company wants to determine whether there is a relationship between their 3 sales offices and the sales of their software products. the actual sales are

product a b c
office 1 18 8 24
2 15 22 13
3 21 16 63

under the null hypothesis, what is the expected number of product A that would be sold by office 2.
a) 27.00 b)10.80 c)13.50 d)18.00

a contingency table is made up of 8 rows and 4 columns. how many degrees of freedom are present?
a)24 b)21 c)28 d)32

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