Question

ages of dogs the ages of 20 dogs in a pet shelter are shown. construct a frequency distribution using 7 classes.
5 3 6 9 9
7 8 4 7 4
9 7 8 8 3
3 3 6 8 3
send data to excel
class limits class boundaries frequency
3 2.5-3.5
4 3.5-4.5
5 4.5-5.5
6 5.5-6.5
7 6.5-7.5
8 7.5-8.5
9 8.5-9.5
total

Explanation:

Step1: List all dog ages

Ages: 5,3,6,9,9,7,8,4,7,4,9,7,8,8,3,3,3,6,8,3

Step2: Count age 3 frequency

Ages=3: positions 2,15,16,17,20 → count=5

Step3: Count age 4 frequency

Ages=4: positions 8,10 → count=2

Step4: Count age 5 frequency

Ages=5: position1 → count=1

Step5: Count age 6 frequency

Ages=6: positions3,18 → count=2

Step6: Count age7 frequency

Ages=7: positions6,9,12 → count=3

Step7: Count age8 frequency

Ages=8: positions7,13,14,19 → count=4

Step8: Count age9 frequency

Ages=9: positions4,5,11 → count=3

Step9: Calculate total frequency

Sum:5+2+1+2+3+4+3=20

Answer:

Class limits	Class boundaries	Frequency
4	3.5-4.5	2
5	4.5-5.5	1
6	5.5-6.5	2
7	6.5-7.5	3
8	7.5-8.5	4
9	8.5-9.5	3
Total		20