Frequency Trees
Complete the frequency tree which represents the 200
members of a gym and their use of the gym.
Attend twice or
more.
Male
124
68
200
Less than twice
a week
Attend twice or
more.
Female
26
A school conducted research into the impact that
completing homework has on students end of year 11
grades.
240 out of the 350 students completed their
homework regularly.
85% of students got their target grade or higher when
they completed their homework regularly .
70% of students who didn’t complete their homework
regularly got below their target grade.
Complete the frequency tree.
Homework
Completed
Less than twice
a week
Calculate the percentage of people attending twice or
more a week.
80 teachers were asked if they prefer tea or coffee.
3
of the teachers were male.
8
Double the amount of male teachers preferred tea
than coffee.
The female teachers preferred tea and coffee in the
ratio of 2:3.
Complete the frequency tree.
On or Above
Target
Below Target
Grade
350
On or Above
Target
Calculate the percentage of females who attend less
than twice a week?
Homework
Not Completed
Below Target
Grade
www.missbsresources.com
You select a teacher at random. What is the likelihood
the teacher is a female who prefers drinking tea?
Frequency Trees
Answers
Complete the frequency tree which represents the 200
members of a gym and their use of the gym.
Male
56
Attend twice or
more.
68
Less than twice
a week
50
Attend twice or
more.
124
200
76
Female
26
=
200
=
100
= 53%
Calculate the percentage of females who attend less
than twice a week?
26
× 100 = 34.2%
76
Homework
Completed
Less than twice
a week
Calculate the percentage of people attending twice or
more a week. 56 + 50
106
53
200
A school conducted research into the impact that
completing homework has on students end of year 11
grades.
240 out of the 350 students completed their
homework regularly.
85% of students got their target grade or higher when
they completed their homework regularly .
70% of students who didn’t complete their homework
regularly got below their target grade.
Complete the frequency tree.
204
Male
20
Tea
10
Coffee
20
Tea
30
Coffee
30
On or Above
Target
80
240
36
Below Target
Grade
33
On or Above
Target
77
Below Target
Grade
350
110
Homework
Not Completed
80 teachers were asked if they prefer tea or coffee.
3
of the teachers were male.
8
Double the amount of male teachers preferred tea
than coffee.
The female teachers preferred tea and coffee in the
ratio of 2:3.
Complete the frequency tree.
www.missbsresources.com
50
Female
You select a teacher at random. What is the likelihood
the teacher is a female who prefers drinking tea?
20 2 1
= =
80 8 4