3. A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rat

[answerhappygod]

3 A University Dean Is Interested In Determining The Proportion Of Students Who Receive Some Sort Of Financial Aid Rat 1 (62.93 KiB) Viewed 13 times

3. A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than examine the records for all students, the dean randomly selects 200 students and finds that 118 of them are receiving financial aid. Find a 95% confidence interval for the true proportion of students on financial aid. 4. A manufacturer claims that the mean lifetime of its lithium batteries is 1,300 hours. A homeowner selects 25 of these batteries and finds the mean lifetime to be 1,280 hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use a = 0.05.