Write a conclusion about odometers. | Computer science

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 1) Odometers measure distance traveled. How accurate are automobile odometers? As part of a project for a statistics class, two students borrowed several cars and drove them over a 10 mile course. Using the odometer readings that follow, calculate an effect size index and find the t test value. Write a conclusion about odometers.
     10.1    9.9    10.1    10.3    10.0    10.2    10.1 

2)  Data Set 9-4
N = 6      SC = 30      SC 2 = 180

Refer to Data Set 9-4. For  µ = 3.00, the effect size index is ?