(a) Interpretation: The absolute and the relative uncertainty is to be determined for the measurement involving 600 count at 90% confidence level. Concept introduction: The standard deviation can be calculated as follows: σ M = M Also, the relative standard deviation can be calculated as follows: σ R = σ M M σ R = M M The absolute uncertainty = z σ M The relative uncertainty = z σ R The formula for the confidence of counting intervals is − R = R ± z σ R

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 32, Problem 32.6QAP
Interpretation Introduction

(a)

Interpretation:

The absolute and the relative uncertainty is to be determined for the measurement involving 600 count at 90% confidence level.

Concept introduction:

The standard deviation can be calculated as follows:

σM=M

Also, the relative standard deviation can be calculated as follows:

σR=σMM

σR=MM

The absolute uncertainty = zσM

The relative uncertainty = zσR

The formula for the confidence of counting intervals is −

R=R±zσR

Interpretation Introduction

(b)

Interpretation:

The absolute and the relative uncertainty is to be determined for the measurement involving 600 count at 95% confidence level.

Concept introduction:

The standard deviation can be calculated as follows:

σM=M

Also, the relative standard deviation can be calculated as follows:

σR=σMM

σR=MM

The absolute uncertainty = zσM

The relative uncertainty = zσR

The formula for the confidence of counting intervals is −

R=R±zσR

Interpretation Introduction

(c)

Interpretation:

The absolute and the relative uncertainty is to be determined for the measurement involving 600 count at 99% confidence level.

Concept introduction:

The standard deviation can be calculated as follows:

σM=M

Also, the relative standard deviation can be calculated as follows:

σR=σMM

σR=MM

The absolute uncertainty = zσM

The relative uncertainty = zσR

The formula for the confidence of counting intervals is −

R=R±zσR

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