#### Answer

$H_{o}: μ = 15 ppm$
$H_{o}: μ < 15ppm$

#### Work Step by Step

Null hypothesis is the theory or status quo. Alternative hypothesis contradicts theory.

Published by
Pearson

ISBN 10:
0321755936

ISBN 13:
978-0-32175-593-3

$H_{o}: μ = 15 ppm$
$H_{o}: μ < 15ppm$

Null hypothesis is the theory or status quo. Alternative hypothesis contradicts theory.

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