Question

A chemist prepared ten 4.85 g quantities of aniline and purified it to acetanilide using fractional crystallization. The following dry yields were recorded.

3.83	3.78	3.86	3.83	3.92
3.38	3.60	3.99	3.70	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

You may need to use the appropriate appendix table or technology to answer this question.

Answer 1

Solution-

The 95% Confidence Interval of the mean grams of acetanilide that can be recovered from an initial amount of 4.85 g of aniline is-

3.645 g to 3.895 g -----------------(rounded to 3 decimal)

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For calculation of CI statistical technology Minitab is used.

Steps in Minitab-

STAT - Basic Statistics - 1Sample t - select data - Ok

Output-