Chapter 19 - From Data Production to Inference: Part III Review - Test Yourself - Page 445: 19.20

Here, we have, μ = 445 , σ = 82 For n = 15 $μ_{x̅} = μ = 445$ $σ_{x̅} = \frac{σ}{\sqrt n} = \frac{82}{\sqrt 15} = 21.17$ For n = 150 $μ_{x̅} = μ = 445$ $σ_{x̅} = \frac{σ}{\sqrt n} = \frac{82}{\sqrt 150} = 6.695$

Here, we have, μ = 445 , σ = 82 For n = 15 $μ_{x̅} = μ = 445$ $σ_{x̅} = \frac{σ}{\sqrt n} = \frac{82}{\sqrt 15} = 21.17$ For n = 150 $μ_{x̅} = μ = 445$ $σ_{x̅} = \frac{σ}{\sqrt n} = \frac{82}{\sqrt 150} = 6.695$