25 students were chosen randomly from a statistics class to solve some problems on confidence intervals. The time required to complete all problems was recorded for every student. The sample mean time was 11 minutes with a sample standard deviation of 5 minutes.Assume large sample
1. Construct a 95% confidence interval for mu, the mean time for the population of students in that statistics class, to solve those problem
2. Interpret your answer to question 1, i.e., state your conclusion
3. Describe how the sample size n affects the width of the confidence interval on mu
4. Describe how the variability of the data affects the width of the confidence interval on mu
5. Describe how the confidence level affects the width of the confidence interval on mu