4.2a-4.2b To draw stem - and - leaf diagrams.

Question 1

stem and leaf diagram

question one
a) 35, 50, 38, 44, 53, 41, 39, 45, 48, 55
b)18, 42, 5, 28, 33, 9, 15, 38, 32, 9, 11, 24, 40, 29, 24

Answer 1

check corbet

Question 2

Question 2: The stem and leaf diagram below shows the ages of a group of people.
a)How many people are there in the group?
b)How old is the youngest member of the group?
c)How old is the oldest member of the group? How many people are under 20?
d)How many people are over 25?

Answer 2

(a) 12 (b) 14 (c) 44 (d) 3 (e) 7

Question 3

look on corbet for graph

The stem and leaf diagram shows the weights of 10 books that are placed on a book shelf.
(a) Write down the modal weight.
(b) Find the median weight.
(c) Find the range of the weights.

Answer 3

a) 0.4kg
(b) 0.75kg
(c) 2.8kg

Question 4

check corbet

Question 4: The stem and leaf diagram shows the time taken 10 students to answer a puzzle
(a) Work out the range
(b) Work out the median

Answer 4

(a) 29 seconds
(b) 16 seconds