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Solving for n
1) We have a Normal distribution with a mean of 10.2 oz and a standard deviation of 2.9 oz. We want to select a
sample size large enough so that our standard deviation is 0.8 oz. What is our sample size?
2) We have a Normal distribution and are told p = 0.3. How large of a sample size is needed to have a standard
deviation of 0.01?
3) We have a Normal distribution with a mean of 165 lbs and a standard deviation of 20.2 lbs. We want to select a
sample size large enough so that our standard deviation is 5 lbs. What is our sample size?
4) We have a Normal distribution and are told p = 0.43. How large of a sample size is needed to have a standard
deviation of 0.015?
5) We have a Normal distribution of SAT scores with a mean of 1060 and a standard deviation of 120. We want to
select a sample size large enough so that our standard deviation is 10. What is our sample size?
6) We have a Normal distribution and are told p = 0.55. How large of a sample size is needed to have a standard
deviation of 0.001?
7) We have a Normal distribution with a mean of 22.4 oz and a standard deviation of 5.68 oz. We want to select a
sample size large enough so that our standard deviation is 0.5 oz. What is our sample size?
8) We have a Normal distribution and are told p = 0.78. How large of a sample size is needed to have a standard
deviation of 0.005?
9) We have a Normal distribution with a mean of 68.4 inches and a standard deviation of 7.6 inches. We want to select
a sample size large enough so that our standard deviation is 0.5 inches. What is our sample size?
10) We have a Normal distribution and are told p = 0.554. How large of a sample size is needed to have a standard
deviation of 0.008?
11) We have a Normal distribution with a mean of 222.4 oz and a standard deviation of 15.68 oz. We want to select a
sample size large enough so that our standard deviation is 1 oz. What is our sample size?
12) We have a Normal distribution and are told p = 0.95. How large of a sample size is needed to have a standard
deviation of 0.007?
13) We have a Normal distribution with a mean of 168.4 inches and a standard deviation of 17.6 inches. We want to
select a sample size large enough so that our standard deviation is 2 inches. What is our sample size?
14) We have a Normal distribution and are told p = 0.5. How large of a sample size is needed to have a standard
deviation of 0.002?