# (a) Interpretation: The standard deviation for the chlorinated hydrocarbons in the air sample is 0.030ppm by using established method. The 95% confidence interval for the mean of the four measurement obtained by this method is to be determined. Concept introduction: The 95% confidence interval for each data is calculated as- C I , μ = x ¯ ± t s N Where, N = degree of freedom μ = confidence interval x ¯ = mean s = standard deviation t = constant ### Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213 ### Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213

#### Solutions

Chapter A1, Problem A1.14QAP
Interpretation Introduction

## (a)Interpretation:The standard deviation for the chlorinated hydrocarbons in the air sample is 0.030ppm by using established method. The 95% confidence interval for the mean of the four measurement obtained by this method is to be determined.Concept introduction:The 95% confidence interval for each data is calculated as-CI,μ=x¯±tsNWhere,N = degree of freedomμ = confidence intervalx¯ = means = standard deviationt = constant

Interpretation Introduction

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