ISAT Data Interpretation: Graphs/Tables 4

Question 1

A table shows the number of defective items produced by three machines per 1000 units. Machine A: 12, Machine B: 8, Machine C: 15. If Machine A produces 5000 units, Machine B produces 3000 units, and Machine C produces 2000 units, what is the total number of defective items?

Accepted Answer

114

Answer

Defective: A = 12/1000 × 5000 = 60; B = 8/1000 × 3000 = 24; C = 15/1000 × 2000 = 30; Total = 60+24+30 = 114.

Question 2

A bar chart shows monthly sales figures for a store. The sales in March ($18,500) were 25% higher than February. What were February's sales?

Accepted Answer

$14,800

Answer

If March = February × 1.25, then February = $18,500 / 1.25 = $14,800.

Question 3

A graph shows the relationship between temperature (°C) and ice cream sales per day at a shop. At 20°C, 80 units are sold; at 25°C, 110 units; at 30°C, 140 units; at 35°C, 170 units. If the linear trend continues, how many units would be sold at 40°C?

Accepted Answer

200

Answer

The pattern shows an increase of 30 units per 5°C rise, so at 40°C = 170 + 30 = 200 units.

Question 4

A pie chart shows the distribution of a country's workforce by sector: Agriculture 15%, Manufacturing 25%, Services 45%, Construction 10%, Other 5%. If 240,000 people work in Manufacturing, what is the total workforce?

Accepted Answer

960,000

Answer

If 25% = 240,000, then total workforce = 240,000 / 0.25 = 960,000.

Question 5

A cumulative frequency graph (ogive) shows the heights of 100 students. The graph shows that 25 students are shorter than 155 cm, and 75 students are shorter than 175 cm. What is the interquartile range (IQR) of student heights?

Accepted Answer

20 cm

Answer

Q1 = 155 cm (25th percentile) and Q3 = 175 cm (75th percentile), so IQR = 175 - 155 = 20 cm.

ISAT - International Student Admissions Test Practice Test

ISAT - International Student Admissions Test Practice Test

ISAT Data Interpretation: Graphs/Tables 4