10.1 Fibobelly confidence interval calculations

Fibobelly this term generated some unusually high values that suggest a measurement issue. In a large class with good attendance, the meter sticks may not be the best approach. 


Cloth tape measures have been ordered to see if those might reduce measurement errors. That 1.818 seems spuriously large. The formulas were also reworked to handle the new format. 


The upside was that the result includes both rejection of the null hypothesis and failure to reject the null hypothesis. 

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