Ten engineering schools in the United States were surveyed. The sample contained 250 electrical engineers, 80 being
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Ten engineering schools in the United States were surveyed. The sample contained 250 electrical engineers, 80 being women; 175 chemical engineers, 40 being women. Compute a 90% confidence interval for the difference between the proportion of women in these two fields of engineering. Is there a significant difference between the two proportions?
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