PLEASE HELP!

Construct a 95% confidence interval to judge whether the two indenters result in different measurement, where the differences are computed as 'diamond minus steel ball'.

See attachment for the full question.

Question

PLEASE HELP!

Construct a 95% confidence interval to judge whether the two indenters result in different measurement, where the differences are computed as 'diamond minus steel ball'.

See attachment for the full question.

anonymous · Answer

attachment

barrycarter · Answer

Hint: what is the mean and SD of "diamond minus steel ball" measurements?

anonymous · Answer

Do i do the diamond and steel ball measurements separately or together?

barrycarter · Answer

I think they want you to subtract them from each other. That's what the problem says.

anonymous · Answer

ok so i take the sum of the diamond measurements and subtract it from the sum of the steel ball measurements?

barrycarter · Answer

I think you subtract them one off. In other words, create another row that has the differences of the measurements.

anonymous · Answer

oh ok