Descriptive statistics

Question 1

Measures of Central Tendency

Answer 1

A form of estimation of a mid-point/average
in a set of data.

Question 2

Measures of Dispersion

Answer 2

A measure that shows the spread of data, whether it is tightly clustered or has a broader spread.

Question 3

Standard deviation

Answer 3

1. Find the Mean (𝑥̄)
2. Subtract the Mean from Each Value (x− xˉ)
3. Square Each Difference Square Each Difference (x− xˉ)2
4. Sum the Squared Differences
   ∑(x− xˉ)2
5. Divide by (n - 1)
6. Square Root the Result

Question 4

Calculate the standard deviation for the following sample data set:
5, 8, 10, 12, 15

Answer 4

3.81