A manager at a local bank analyzed the relationship between monthly salary (y is

Question

A manager at a local bank analyzed the relationship between monthly salary (y is $) and length of service (x, measured in months) for 30 employees. She estimates Salary = beta_0 + beta_1 services + x. The following table summarizes a portion of the regression results: Refer to Exhibit l4-6. The monthly salary of an employee that has worked for 50 months at the bank is closest to: A. $441 B. $1244. C. $785. D. $1226. Given a population variance of 144, what is the standard deviation? A sigma = 12 B. s = 12 C. y plusminus 12

Explanation / Answer

39) for X=30; monthly salary =784.92+9.19*50=1244.42

option B

40)as std deviation =(variance)1/2 =12 ; option A

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