here's what i have gotten so far:

this is for two different processes for producing precision ball bearings that a company is experimenting with:

Process A ProcessB

Mean: .002mm .0026mm

SD: .0001mm .00012mm

Sample Size: 12 14

now for the question:

what is the critical t value at the 1% level of significance and what is the computed value of t?

can anyone help me with this! i have been around and around with this!!!!

thanks!