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A survey of 1000 students found that 274 chose professional baseball team A as their favorite team. In a similar survey involving 760 students, 239 of them chose team A as their favorite. Compute a 95% confidence interval for the difference between the proportions of students favoring team A in the two surveys. Is there a significant difference? Click here to view page 1 of the normal probability table. Click here to view page 2 of the normal probability table. C Let p, be the population proportion studied in the first survey and let p₂ be the population proportion studied in the second survey. The 95% confidence interval is (Round to four decimal places as needed.) <P₁ - P₂<-
Ten engineering schools in a country were surveyed. The sample contained 225 electrical engineers, 70 being women; 200 chemical engineers, 20 being women. Compute a 99% confidence interval for the difference between the proportions of women in these two fields of engineering. Is there a significant difference between the two proportions? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. C Let p, be the population proportion of electrical engineers that are women in the schools that were surveyed and let p₂ be the population proportion of chemical engineers that are women in the schools that were surveyed. The 99% confidence interval is <P₁-P₂ < (Round to three decimal places as needed.)