The melting points of two alloys employed in formulating solder were investigated by melting 21 samples of each material. The sample mean and standard deviation for alloy 1 was X1= 420.48 and S1= 2.34. And for alloy 2 they were X2= 425 and S2=2.5
a. Do the sample data support the claim that both alloys have the same melting point? Use a fixed-level test at alpha = .05 and assume that both populations are normally distributed and have the same standard deviation.
b. Find the P-Value for this test