Choose the correct NULL hypothesis for the given scenario. The school board is wondering about pedestrian safety in the school zone.  They conduct a study to determine whether or not traffic moves at the posted limit of 25 miles per hour during the school day. A.  ?≠25μ≠25?≠25μ≠25 B.  ?=25μ=25?=25μ=25 C.  ?⎯⎯⎯=25x¯=25?⎯⎯⎯=25x¯=25 D.  ?⎯⎯⎯≠25

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter1: Variables, Expressions, And Integers
Section1.5: Adding Integers
Problem 45E
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Choose the correct NULL hypothesis for the given scenario.

The school board is wondering about pedestrian safety in the school zone.  They conduct a study to determine whether or not traffic moves at the posted limit of 25 miles per hour during the school day.

A.  ?≠25μ≠25?≠25μ≠25

B.  ?=25μ=25?=25μ=25

C.  ?⎯⎯⎯=25x¯=25?⎯⎯⎯=25x¯=25

D.  ?⎯⎯⎯≠25

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Given 

μ=25  Population mean

 

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