Nambe Mills manufactures plates bowls and othertableware fro an alloy of several metals. Each item mustgo throughseveralsteps including polishing. To better understand the production process and its impact on pricing, the company checked the polishing time and the retail price. The regression analysis is shown below.

Dependent variable is Price

R-squared = 84.5%

s= 20.50with 59 - 2= 57 degrees of freedom

variable coefficient se(coeff)

intercept -2.89054 5.730

time 2.49244 0.1416

Use a 95% confidence interval for the slope between polishing time and retail price.