A confidence interval was used to estimate the proportion of ...

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A confidence interval was used to estimate the proportion of statistics students who are female. A random sample of 72 statistics students generated the following 90 confidence interval: (0.438, 0.642). Using the information above, what total size sample would be necessary if we wanted to estimate the true proportion to within 0.08 using 95 confidence?
 
  A) 105 B) 597 C) 420 D) 150

Question 2

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. If the dean wanted to estimate the proportion of all students receiving financial aid to within 3 with 99 reliability, how many students would need to be sampled?
 
  A) n = 1,503 B) n = 1,844 C) n = 1,784 D) n = 1,435

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Answer to Question 1

D

Answer to Question 2

C

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TYSM

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Excellent