Answer:
Option b
Explanation:
Box plot method:
Step 1: Find the minimum. Minimum is the smallest data.
Minimum = 5
Step 2: Find the maximum. Maximum is the largest data.
Maximum = 15
Step 3: Arrange the numbers in ascending order.
5, 6, 8, 9, 9, 11, 11, 13, 15
Median = middle term
= 9
Step 4: Find the first quartile. First quartile is the median of the data to the left of the median.
Data left to the median are 5, 6, 8, 9.
Q1 = (6+8) ÷ 2
= 14 ÷ 2
= 7
Step 5: Find the second quartile. Second quartile is the median of the data to the right of the median.
Data left to the median are 11, 11, 13, 15.
Q12 = (11+13) ÷ 2
= 24 ÷ 2
= 12
Answer: Min = 5
Q1 = 7
Median = 9
Q2 = 12
Max = 15