1. No, unfortunately ours did not match, but was close. The true value for zinc is 7.14. Our intervals were 6.48-6.91 at 90% and 6.44 - 6.95 at 95%.
2. The interval increased as the confidence level increased. The range that is considered as acceptable is so large that the results are really meaningless.
3. If you make an error, initially, and continue to make the same error with subsequent measurements it should not make a difference. However, if you make an error and it is corrected when you gather the rest of your data it will skew your results.
1 comment:
It appeared to me that the zinc easily lent itself to air bubbles in the sample as it was emerged in the water. It would have an impact on your results skewing your volume and thus making your calculations for density low.
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