Question 1

The stem-and-leaf plot displays the approximate percentage inflation rate for a number of countries, correct to one decimal place.

2	8	9
3	1	4	4	7
4	2	4	5	5	7	9
5	0	1	1	4	5	7	9
6	2	3	5	6	6
7	2	4					2|8 means 2.8%

Question a to c - multiple choice question

a	The number of countries included in the sample is:
	6	26	32
b	The number of countries that have an inflation rate greater than 5.5% is:
	9	10	11
c	A country is said to have an unstable economy if the inflation rate is higher than 6.4%. The number of countries in this sample that have a stable economy is:
	20	21	25

Question 2

The weights of 41 male and 39 female students are compared in the back-to-back stem-and-leaf plot below. The weights are given correct to the nearest kilogram.

Females														Males
9											8		3
9				8	8	7	7	7	7	6	6		4
9	8	7	7	7	5	4	1	1	0	0	0		5	2	8
5					4	4	4	0	0	0	0		6	1	1	1	3	3	4	4	5	5	5	7	7	8	9
5								2	1	0	0		7	0	0	1	2	3	3	5	5	7	8
1										0	0		8	0	0	1	2	3	3	5	5	7	8
													9	0	7
													10	0	0	9

Question 2a - c - multiple choice question

a	The number of females who weigh more than 79 kg is:
	2	3	5
b	The difference in weight between the heaviest and lightest males is:
	48 kg	51 kg	57 kg
c	The weight of the 21st heaviest female is:
	57	58	59