Question 1192324
The sample size (n) cannot be directly determined from the given information. Here's why:

* **Missing Margin of Error:** The formula for calculating sample size in a confidence interval for the mean requires the margin of error (E). The margin of error represents the desired level of precision for the estimate. 

**Formula:**

n = (Zα/2 * σ / E)² 

where:

* n = sample size
* Zα/2 = critical value from the standard normal distribution (1.96 for 95% confidence)
* σ = population standard deviation (√σ² = √2401 = 49)
* E = margin of error

**To find the sample size (n), you would need to specify the desired margin of error (E).** 

**Example:**

Let's say you want a margin of error of 5 units:

n = (1.96 * 49 / 5)² 
n = (19.208)² 
n ≈ 369

In this example, a sample size of approximately 369 would be needed to achieve a 95% confidence interval with a margin of error of 5 units.