Compute the range and sample standard deviation for strength of the concrete (in psi). 3920, 4090, 3300, 3100, 2940, 3830, 4090, 4030

The range is

1150 psi.

sequals

nothing psi (Round to one decimal place as needed.)

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,