Option #1: Sample A
Sample A has a smaller sample size, which means the standard deviation of the sample mean will be smaller compared to Sample B with a larger sample size.
A factory produces light bulbs and wants to estimate the average lifetime of all bulbs produced. The factory manager takes two random samples of bulbs from the production line. Sample A contains 100 bulbs with an average lifetime of 500 hours, and Sample B contains 500 bulbs with an average lifetime of 490 hours. Which sample will have a lower standard deviation of the sample mean?
Option #1: Sample A
Option #2: Sample B
(1 point)
Option #
will have a lower standard deviation of the sample mean.
1 answer
1 answer