1. Calculate the fundamental statistical parameters (all measures of central tendency and variability/dispersion) for the following set of data obtained by a chemistry student attempting to determine the molarity of some solution by titrations: 0.2041; 0.2049; 0.2039; 0.2043. Is any of the data suspect? How did you determine your response?" Mean, median, range (spread), average deviation, relative average deviation, standard deviation, coefficient of variation. Try to calculate the confidence interval and report the statistically probable mean value at the 95% confidence level.

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter7: Statistical Data Treatment And Evaluation
Section: Chapter Questions
Problem 7.16QAP
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Hello, Can you please answer these 3 questions? Thank you!

1. Calculate the fundamental statistical parameters (all measures of central tendency and
variability/dispersion) for the following set of data obtained by a chemistry student attempting to
determine the molarity of some solution by titrations: 0.2041; 0.2049; 0.2039; 0.2043. Is any of
the data suspect? How did you determine your response?"
Mean, median, range (spread), average deviation, relative average deviation, standard deviation,
coefficient of variation.
Try to calculate the confidence interval and report the statistically probable mean value at the 95%
confidence level.
2. Apply the F- and t-tests to determine if there is a significant difference in following data sets (@
95% confidence). [x₁=42.34, s₁=0.15, n₁=6] [x2=43.24, s2=0.10, n₂=4] Answer the following
questions:
Do the data sets differ in their standard deviations?
Are their means different?
3. Calcium in a mineral was analyzed five times by each of two methods, with similar standard
deviations. Are the mean values significantly different at the 95% confidence level?
Method X
0.0271 0.0282 0.0279 0.0271 0.0275
Method Y
0.0271
0.0268
0.0263 0.0274
0.0269
Transcribed Image Text:1. Calculate the fundamental statistical parameters (all measures of central tendency and variability/dispersion) for the following set of data obtained by a chemistry student attempting to determine the molarity of some solution by titrations: 0.2041; 0.2049; 0.2039; 0.2043. Is any of the data suspect? How did you determine your response?" Mean, median, range (spread), average deviation, relative average deviation, standard deviation, coefficient of variation. Try to calculate the confidence interval and report the statistically probable mean value at the 95% confidence level. 2. Apply the F- and t-tests to determine if there is a significant difference in following data sets (@ 95% confidence). [x₁=42.34, s₁=0.15, n₁=6] [x2=43.24, s2=0.10, n₂=4] Answer the following questions: Do the data sets differ in their standard deviations? Are their means different? 3. Calcium in a mineral was analyzed five times by each of two methods, with similar standard deviations. Are the mean values significantly different at the 95% confidence level? Method X 0.0271 0.0282 0.0279 0.0271 0.0275 Method Y 0.0271 0.0268 0.0263 0.0274 0.0269
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