Question 1192316
**1. Identify the given values:**

* Population standard deviation (σ): 3
* Sample size (n): 81

**2. Calculate the standard deviation of the sample means (standard error of the mean):**

* Standard error of the mean (σ_x̄) = σ / √n

* σ_x̄ = 3 / √81 
* σ_x̄ = 3 / 9
* σ_x̄ = 1/3 
* σ_x̄ = 0.3333

**Therefore, the standard deviation of the sample means is 0.3333.**