**Answer:**

**Explanation:**

**Given**

3920, 4090, 3300, 3100, 2940, 3830, 4090, 4030

**Required**

- Determine the Range

- Determine the Standard Deviation

**Calculating the Range...**

The Range is calculated using the following formula;

From the given data;

Hence,

**Calculating the Standard Deviation...**

**Start by calculating the mean**

**Where x->3920, 4090, 3300, 3100, 2940, 3830, 4090, 4030**

**n = 8**

**Subtract the mean from each observation**

**Square the result of the above**

**Add the above results together**

**Divide by n**

Take Square root of the above result to give standard deviation

Hence,