Chapter 15 - Sampling Distributions - Apply Your Knowledge - Page 355: 15.10b

25

Here, we have n = ?, σ = 10, $σ_{x̅} = 2$ $2 = \frac{10}{\sqrt n}$ $5 = \sqrt n$ n = 25 If we have more measurements, then the estimates will be more accurate as there is more of the population involved in the process, while with one measurement, only a very small fraction of population is available, leading to inaccurate results.