On the following two data sets, are they significantly different at the 99% conf

Question

On the following two data sets, are they significantly different at the 99% confidence level?

Coins Pre-1982, Coins Post 1982
Coin, Weight (g), Weight (g)
1, 3.052, 2.503
2, 3.077, 2.471
3, 3.072, 2.507
4, 3.051, 2.488
5, 3.090, 2.516
6, 3.133, 2.516
7, 3.059, 2.501
8, 3.076, 2.499
9, 3.079, 2.503
10, 3.113, 2.495

Mean: 3.0802 2.4999
SD: 0.16976 0.01330
RSD %: 5.511 0.532

I collected this data and have calculated the mean, SD, and RSD thus far and need to perform the T-Test. How do I do this and are the differences statistically significant?

Explanation / Answer

The level of confidence is set by the researcher .the difference between the two means still may be significantly different.at several confidence levels, 50%, 95% and 99%.

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