Prediction of batch heat transfer coefficients for pseudoplastic fluids ...

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greater than 2.0. In this case therefore there is a 90%
probability that the difference in variance between correlation
A ~nd
C is significant. Thus correlation C is a better
fit for the anchor data.
It may be seen from this example that in order for a
correlation to be significantly better than another the ratio
of the variances must be about 1 • .5 or gl"eatel", depending upon
the degrees of freedom and choice of probability limits
desired.. Comparison of the variances listed in Table 5-7
shows that the above eXELmple was the only case in Hhich one
correlation 1-laS significantly better than another for all of
the fluids tested. Thus, except for the anchor agitator,
the three correlations fit the data equally v.Jell..
It l