# Question: Construct an 80 confidence interval to estimate the population mean

Construct an 80% confidence interval to estimate the population mean when = 125 and σ = 32 for the following sample sizes:

a. n = 30

b. n = 60

c. n = 90

a. n = 30

b. n = 60

c. n = 90

## Answer to relevant Questions

Determine the margin of error for a confidence interval to estimate the population mean with n = 20 and σ = 16 for the following confidence levels: a. 80% b. 90% c. 99% The following data show the number of hours per day 12 adults spent in front of screens watching television related content: 1.3 4.9 4.2 4.8 7.6 6.9 5.4 2.2 5.3 1.8 2.4 8.3 a. Construct a 95% ...Determine the margin of error for a 95% confidence interval to estimate the population proportion with a sample proportion equal to 0.70 for the following sample sizes: a. n = 125 b. n = 200 c. n = 250 Construct a 98% confidence interval to estimate the population mean with = 60 and σ = 12 for the following sample sizes: a. n = 35 b. n = 45 c. n = 55 Red Fire Grill would like to estimate the proportion of tips that exceed 18% of its dinner bills. Without any knowledge of the population proportion, determine the sample size needed to construct a 90% interval with a margin ...Post your question