8.4.2 Measures of Dispersion for Ungrouped Data, SPM Paper (Long Questions)

Question 3:
The mean of five numbers is $\sqrt{p}$ . The sum of the squares of the numbers is 120 and the standard deviation is 2q. Express p in terms of q.

Solution:

Question 4:
A set of positive integers consists of 1, 4 and p. The variance for this set of integers is 6. Find the value of p.

Solution: