Final answer:
To compute the minimum sample size for an interval estimate, we need to determine the level of confidence, desired margin of error, and population variability. We do not need to determine the true value of the population parameter.
Step-by-step explanation:
To compute the minimum sample size for an interval estimate, we need to determine the level of confidence (e.g., 90%, 95%), the desired margin of error, and the variability of the population. However, one thing we do not need to determine is the true value of the population parameter. The confidence interval is used to estimate the population parameter without knowing its exact value. So, the answer is the true value of the population mean.