Two types of aluminum sheet metal are being tested to use as aircraft skin. 15 samples of Sheet metal 1 have a mean Tensile strength of 24 KSI and 13 samples of Sheet metal 2 have a mean Tensile...

Two types of aluminum sheet metal are being tested to use as aircraft skin. 15 samples of Sheet metal 1 have a mean Tensile strength of 24 KSI and 13 samples of Sheet metal 2 have a mean Tensile strength of 19 KSI both having a standard deviation of 2 KSI. They will use sheet metal 1 if its Tensile strength exceeds the Tensile strength of sheet metal 2 by at least 2 KSI. Make a conclusion based on the given data, use 0.05 level of significance.


Find the:
Parameter of interest: ?
Null hypothesis: ?
Alternative hypothesis: ?
Test statistic: ?
Reject H0 if: ?
Computations: ?
Conclusion: ?