A company is converting its overloaded computer system to a newer system and must rewrite a large number of computer programs for the new system.A sample of 10 programs are rewritten and the linear regression relation between number of man-hours required to rewrite a program (y) and the length of the program measured in number of statements (x) is estimated as = 2.3 + 0.060X. Other estimates obtained in the regression analysis are: The standard error S_e = 1.1, = 90, and SS_XX = 10,000.

Ninety-five percent confidence limits for the slope b₁ of the regression function are:

a)0.06 +0.025

b)0.06 +0.011

c)0.06 +2.540

d)0.06 +0.110

e)0.06 +0.140