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In a certain region, 24% of people over age 50 didn't graduate from high school. We...

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Statistics

In a certain region, 24% of people over age 50 didn't graduatefrom high school. We would like to know if this percentage is thesame among the 25-30 year age group. Use critical values to exactly3 decimal places.

(a) How many 25-30 year old people should be surveyed in order toestimate the proportion of non-grads to within 6% with 99%confidence?

(b) Suppose we wanted to cut the margin of error to 2%. How manypeople should be sampled now?  

(c) What sample size is required for a margin of error of3%?  

Answer & Explanation Solved by verified expert
4.0 Ratings (675 Votes)
Solution Given that 24 0241 1 024 076At 99 confidence level the z is 1 99 1 099 001 2    See Answer
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