• Parameter: Total number of DA students
• Statistic: Total number of hours a DA student study in the library

1. If you are interested in decreasing the error bound while keeping the confidence level constant, what will happen to the sample size? Explain.
2. If you are interested in increasing the confidence level while keeping the sample size constant, what will happen to the error bound? Explain.
3. If you are interested in increasing the sample size while keeping the error bound constant, what will happen to the confidence level? Explain.
4. How many additional students must you sample for the error bound to be half its size? Use c = 0.95. Keep t-score or z-score the same as part d.
5. How many additional students must you sample for the error bound to stay the same & the confidence level to change to 99.9%? Use c = 0.95. Keep t-score or z-score the same as part d.