In a test of the effect of dampness on electric connections, 100 electric connections were tested under damp conditions and 150 were tested under dry conditions. Twenty of the damp connections failed and only 10 of the dry ones failed. Find a 90% confidence interval for the difference between the proportions of connections that fail when damp as opposed to dry.

Inference for Linear Regression: - The idea: o The calculated intercept b0 is a statistic that estimates the population intercept B . The 0 calculated intercept b1 is a statistic that estimates the population intercept B1 . o We can thus...