In: Statistics and Probability
Organic chemists often purify organic compounds by a method known as fractional crystallization. An experimenter wanted to prepare and purify 4.85 g of aniline. Ten 4.85 g quantities of aniline were individually prepared and purified to acetanilide. The following dry yields were recorded.
3.86 3.79 3.90 3.87 3.92 |
3.34 3.62 4.01 3.71 3.81 |
Estimate the mean grams of acetanilide that can be recovered
from an initial amount of 4.85 g of aniline. Use a 95% confidence
interval. (Round your answers to three decimal places.)
g to g
We have for given data,
Sample mean =3.783
Sample standard deviation =0.1904
Sample size =10
Level of significance=1-0.95=0.05
Degree of freedom =9
t critical value is (by using t table)=
2.262
Confidence interval formula is
=(3.647, 3.919)
Lower confidence limit=3.647
Upper confidence limit=3.919