Case Example: Medication
and Response Time


A new type of non-drowsy pain medication developed by Crump Labs was tested on a group of 16 volunteers.  The volunteers were then given a reaction/ response time test that produced the following scores:

60.8 45.7 75.4 118.0 74.3 59.8 59.9 92.7
66.9 76.6 44.1 82.5 65.2 82.3 80.1 70.0

They are to be compared to a separate group of 16 subjects (the control group) which produced the following results:

138.2 94.2 54.3 121.7 70.7 110.3 71.0 75.6
95.3 99.0 104.0 65.6 105.1 92.3 99.1 106.7

At the 0.05 significance level, test the claim that the population variance of individuals taking the pain medication does not significantly differ from the population variance of those not taking the medication.

Here are the variances:

Experimental group s2= 322.077,  Control group s2= 481.320

This is more than enough information to conduct a hypothesis test of variances.


   

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