# (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 ### 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 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=MAlso, the relative standard deviation can be calculated as follows:σR=σMMσR=MMThe absolute uncertainty = zσMThe relative uncertainty = zσRThe 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=MAlso, the relative standard deviation can be calculated as follows:σR=σMMσR=MMThe absolute uncertainty = zσMThe relative uncertainty = zσRThe formula for the confidence of counting intervals is −R=R±zσR

Interpretation Introduction

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