Science

ChemistryPrinciples of Instrumental Analysis(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 = constantStart your trial now! First week only $4.99!*arrow_forward*

BuyFind*launch*

7th Edition

Douglas A. Skoog + 2 others

Publisher: Cengage Learning

ISBN: 9781305577213

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-

Where,

N = degree of freedom

s = standard deviation

t = constant

Interpretation Introduction

**(b)**

**Interpretation:**

The standard deviation for the chlorinated hydrocarbons in the air sample is 0.030ppm by using established method. The number of measurements is to be determined when 95% confidence interval is to be

**Concept introduction:**

The 95% confidence interval for each data is calculated as-

Where,

N = degree of freedom

s = standard deviation

t = constant