The melting points of two alloys used in formulating solder were investigated by melting 21 samples of each material. The sample mean and standard deviation for alloy 1 was $1 = 420F and 31 = 4F, while for alloy 2 they were 122 = 426F and 52 = 3F. Does the data support the claim that both alloys have the same melting point? Assume that both populations are normally distributed and have the same standard deviation. Use a = 0.05. 8. Confidence Interval: Construct the appropriate confidence interval around the target parameter