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July 30, 2014

Homework Help: Maths

Posted by Naveen on Friday, December 9, 2011 at 7:24am.

The diameter of a ball bearing is to have an average of 2.0 Cm. A random sample of 10 bearings is selected every hour to check the diameters. The sample selected at 9 a.m. gave the following measurements: 2.02, 2.04, 2.00, 1.98, 1.98, 2.04, 2.04, 2.00, 2.02, 1.96. Calculate the t - value and draw your conclusions, if any.

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