Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. A sample of100 items is drawn from this population. What is the standard error of the mean?
A) 2.5
B) 1.8
C) 18.0
D) 0.25

Question

Quizplus · Accepted Answer

The standard error of the mean is calculated by dividing the population standard deviation by the square root of the sample size: SE = σ / √n. Here, σ = 25 pounds and n = 100. Thus, SE = 25 / √100 = 25 / 10 = 2.5.

Suppose a Population Has a Mean Weight of 180 Pounds