The Incorporation of Uranium and Silver by Hydrothermally Synthesized Galena (Econ. Geology, 1964: 1003-1024) reports on the
Question:
The Incorporation of Uranium and Silver by Hydrothermally Synthesized Galena" (Econ. Geology, 1964: 1003-1024) reports on the determination of silver content of galena crystals grown in a closed hydrothermal system over a range of temperature. With x = crystallization temperature in ?C and y = Ag2S in mol%, the data follows:
a. Estimate true average silver content when temperature is 500?C using a 95% confidence interval.
b. How would the width of a 95% CI for true average silver content when temperature is 400?C compare to the width of the interval in part (a)? Answer without computing this new interval.
c. Calculate a 95% CI for the true average change in silver content associated with a 1?C increase in temperature.
d. Suppose it had previously been believed that when crystallization temperature was 400?C, true average silver content would be. 25. Carry out a test at significance level .05 to decide whether the sample data contradicts this prior belief.
Accounting Principles
ISBN: 978-0470533475
9th Edition
Authors: Jerry J. Weygandt, Paul D. Kimmel, Donald E. Kieso