Question

which concept below is not a main idea of estimating a population proportion?
choose the correct answer below.
a. using a sample statistic to estimate the population proportion is utilizing descriptive statistics.
b. the sample proportion is the best point estimate of the population proportion.
c. knowing the sample size necessary to estimate a population proportion is important.
d. we can use a sample proportion to construct a confidence interval to estimate the true value of a population proportion.

Explanation:

• Option A: Using a sample statistic (like sample proportion) to estimate population proportion is a key concept in estimation.
• Option B: The sample proportion is indeed the best point estimate of the population proportion.
• Option D: A confidence interval using sample proportion gives a range for the true population proportion.
• Option C: While sample size is important for the accuracy of the estimate (e.g., in confidence interval width), it is not a main conceptual idea of estimating a population proportion itself compared to the other options which directly relate to the act of estimation (using sample - stat, point - estimate, confidence - interval).

Answer:

C. Knowing the sample size necessary to estimate a population proportion is important.