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The success rate of a method for estimating the brace forcecan be measured by a probability...

The success rate of a method for estimating the brace forcecan be measured by a probability of an overestimate.
An experiment was conducted to evaluate a standard methodfor estimating the brace force for a compression web brace.

In a sample of 380 short test columns, the method overestimated the force for 304 of them, and in a sample of 39long test columns, the method overestimated the force for 360

of them.
Find a 95% confidence interval for the difference between

the success rates for long columns and short columns.

Math   Statistics-And-Probability   
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