Question

A test is to be conducted involving the mean holding power of two glues designed for plastic. First, a small plastic hook was coated at one end with Epox glue and fastened to a sheet of plastic. After it dried, weight was added to the hook until it separated from the sheet of plastic. The weight was then recorded. This was repeated until 12 hooks were tested. The same procedure was followed for Holdtite glue, but only 10 hooks were used. The sample results, in pounds, were:

	Epox	Holdtite
Sample mean	210	255
Sample standard deviation	5	8
Sample size	12	10

Is there a difference between the mean holding power of Epox and that of Holdtite? Use the .01 significance level.

(Click to select)RejectDo not reject H0. There is (Click to select)a significantno significant difference between the mean holding power of Epox and that of Holdtite.

Answer 1

as test statistic falls in rejection region;

Reject Ho, There is a significant  difference between the mean holding power of Epox and that of Holdtite.