# Question

A random sample of 10 shipments of stick-on labels showed the following order sizes.

(a) Construct a 95 percent confidence interval for the true mean order size.

(b) How could the confidence interval be made narrower? (Data are from a project by MBA student Henry Olthof Jr.)

(a) Construct a 95 percent confidence interval for the true mean order size.

(b) How could the confidence interval be made narrower? (Data are from a project by MBA student Henry Olthof Jr.)

## Answer to relevant Questions

Prof. Green gave three exams last semester. Scores were normally distributed on each exam. Below are scores for 10 randomly chosen students on each exam. (a) Find the 95 percent confidence interval for the mean score on each ...A car dealer is taking a customer satisfaction survey. Find the margin of error (i.e, assuming 95% confidence and π = .50) for (a) 250 respondents, (b) 125 respondents, and (c) 65 respondents. Calculate the FPCF for each sample and population size. Can the population be considered effectively in finite in each case? a. N = 450, n = 10 b. N = 300, n = 25 c. N = 1800, n = 280 Popcorn kernels are believed to take between 100 and 200 seconds to pop in a certain micro- wave. (a) Estimate using Method 3 from Table 8.11. (b) What sample size (number of kernels) would be needed to estimate the true ...How large a sample size would be needed to estimate the percentage of wireless routers in San Francisco that use data encryption, with an error of ±2 percent and 95 percent confidence?Post your question

0