(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

BuyFind

Principles of Instrumental Analysis

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

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¯±tsN

Where,

N = degree of freedom

μ = confidence interval

x¯ = mean

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 ±0.017.

Concept introduction:

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

CI,μ=x¯±tsN

Where,

N = degree of freedom

μ = confidence interval

x¯ = mean

s = standard deviation

t = constant

Want to see the full answer?

Check out a sample textbook solution.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.