# Question: a Determine the sample size required to estimate a population

a. Determine the sample size required to estimate a population mean to within 10 units given that the population standard deviation is 50. A confidence level of 90% is judged to be appropriate.

b. Repeat part (a) changing the standard deviation to 100.

c. Re-do part (a) using a 95% confidence level.

d. Repeat part (a) wherein we wish to estimate the population mean to within 20 units.

b. Repeat part (a) changing the standard deviation to 100.

c. Re-do part (a) using a 95% confidence level.

d. Repeat part (a) wherein we wish to estimate the population mean to within 20 units.

**View Solution:**## Answer to relevant Questions

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