EBK EXPLORING CHEMICAL ANALYSIS
EBK EXPLORING CHEMICAL ANALYSIS
5th Edition
ISBN: 8220101443908
Author: Harris
Publisher: MAC HIGHER
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Chapter 4, Problem 4.11P
Interpretation Introduction

Interpretation:

The given average values are identified that whether they are significantly different at 95%.

Concept Introduction:

F Test:

    Fcalculated = s12s22 If Fcalculated>Ftable for n1-1 and n2-2, degrees of freedom, the standard deviations s1 and s2 are significantly different.

t test:

    tcalculated = |x1¯x2¯|spooledn1×n2n1+ n2spooleds12(n1-1)+ s22(n2-1)n1+ n2- 2    If tcalculated>ttable for 95 % confidence interval and n1+n2-2, degrees of freedom the difference is significant. Here, s1 and s2 are standard deviations, x1¯ and x2¯ are mean values.

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