WorksheetsPercentiles and cumulative frequency practice
Total questions: 15
Worksheet time: 8mins
If I tell you that you scored at the 55th percentile on your final exam, you would know:
55% of the class scored the same or worse than you did
You earned a 55% on the exam
You failed the exam
45% of the class scored worse than you did
The Median is also referred to as
the 25th Percentile
the 50th Percentile
the 75th Percentile
the 100th Percentile
Connor does a survey on how much money 100 people spend over the Christmas period.
The results have been plotted on a cumulative frequency diagram.
Estimate the value of the 30th percentile.
£ 24
£ 20
£ 30
£ 28
Connor does a survey on how much money 100 people spend over the Christmas period.
The results have been plotted on a cumulative frequency diagram.
Use the cumulative frequency diagram to estimate the number of people who spent over £50 during the Christmas period. write your answer as a figure only.
(a)
Eve collects information on the household spending per day for 100 families. The information has been summarised in the cumulative frequency diagram below.
How many families spend greater than £25, but lower than £45, per day?
52 families
32 families
84 families
41 families
Eve collects information on the household spending per day for 100 families. The information has been summarised in the cumulative frequency diagram below.
The 70th percentile is £ (a)
Write you answer as a figure.
A TV company surveyed 88 of its employees to find out how much time they spend travelling to work on a given day. The results of the survey are shown in the following cumulative frequency diagram.
Estimate the 50th Percentile
42 minutes
34 minutes
29 minutes
49 minutes
A TV company surveyed 88 of its employees to find out how much time they spend travelling to work on a given day. The results of the survey are shown in the following cumulative frequency diagram.
Calculate the interquartile range.
15 minutes
20 minutes
10 minutes
25 minutes
A TV company surveyed 88 of its employees to find out how much time they spend travelling to work on a given day. The results of the survey are shown in the following cumulative frequency diagram.
Only 10% of the employees spent less than K minutes travelling to work. Find the value of K.
K =15 minutes
K = 20 minutes
K = 10 minutes
K = 25 minutes
This cumulative frequency graph shows the speeds in kmh-1 of cyclists passing a certain point on a race track.
Find the median speed of the cyclists.
21 kmh-1
19 kmh-1
30 kmh-1
15 kmh-1
This cumulative frequency graph shows the speeds in kmh-1 of cyclists passing a certain point on a race track.
Write down the 65th percentile
21 kmh-1
20 kmh-1
30 kmh-1
15 kmh-1
Estimate how many balls had a weight of less than 80 g.
Write the figure only
(a)
Estimate how many balls had a weight of 130 g or more.
78
22
11
32
The diagram shows a cumulative frequency curve for the percentage scored by the students of a primary school in their end of year maths test.
Many of the students complained about how hard it was.
What is the median score?
30%
35%
50%
20%
