# Question: Determine the sample size needed to construct a 95 confidence

Determine the sample size needed to construct a 95% confidence interval to estimate the population mean for the following margins of error when σ = 80:

a. 10

b. 15

c. 20

a. 10

b. 15

c. 20

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

Determine the sample size needed to construct a 99% confidence interval to estimate the population proportion when p = 0.40 and the margin of error equals 5%. Herr Foods, a producer of a variety of salty snacks, would like to estimate the average weight of a bag of BBQ potato chips produced during the filling process at its Nottingham, Pennsylvania, plant. Determine the sample ...Construct a 95% confidence interval to estimate the population proportion using the following data: = 22 n = 75 N = 500 Determine the margin of error for an 80% confidence interval to estimate the population mean with σ = 50 for the following sample sizes: a. n = 30 b. n = 45 c. n = 60 GMAC reported that 85% of drivers incorrectly answered a question asking them what they are supposed to do when approaching a yellow light. (The correct answer is slow down and proceed through the light only if it is safe to ...Post your question