Final answer:
To find the standard deviation from a given variance of 8.1 grams, you need to calculate the square root, which is approximately 2.8460 grams.
Step-by-step explanation:
The question asks for the standard deviation when the variance is 8.1 grams. To find the standard deviation, you need to take the square root of the variance. Let's calculate it step-by-step:
- Identify the variance, which is given as 8.1 grams.
- Calculate the square root of the variance to find the standard deviation: √8.1 ≈ 2.8460 (rounded to four decimal places).
Thus, the standard deviation is approximately 2.8460 grams.