Data Analysis Estimation Mock Tests

A table shows the number of books read by 8 students: 5, 8, 12, 15, 10, 7, 11, 9. What is the estimated average number of books read?

A bar chart shows the monthly electricity consumption (in kWh) for a household over six months: January: 900 February: 850 March: 750 April: 700 May: 800 June: 950 The household wants to reduce their average monthly consumption to 800 kWh over these six months. How many kWh must they reduce in June to achieve this target?

A table shows the population and area of 4 regions: Region 1 (500,000 people, 200 sq km), Region 2 (300,000 people, 150 sq km), Region 3 (800,000 people, 400 sq km), Region 4 (150,000 people, 100 sq km). Which region has the highest population density?

A table shows the number of passengers on 5 flights: Flight 1 (180), Flight 2 (200), Flight 3 (195), Flight 4 (210), Flight 5 (175). What is the estimated total number of passengers?