Please answer 3. the mass per unit area of a type of plastic sheet is 2kg per m². state the rate in g per 100 cm²

4. a rubber plantation uses fertiliser at a rate of 250kg per hectare. state the rate of fertiliser consumption in g per m². [ 1 hectare = 10 000m² ]

Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain