Question 19 • Probability and Statistics with Applications Honors Sem-2-FL-1210300 (2024-2025)
The variability of the sampling distribution of the sample mean is measured by its standard error, which is the population standard deviation divided by the square root of the sample size. A larger sample size gives a smaller standard error, so among 25, 35, 45, and 55, the sample size of 55 has the least variability.
AI-written and checked against the verified answer.