The Large Data set

Question 1

How many brands of cars are in the large data set?

Answer 1

5

Question 2

How many electric vehicles are in the large data set?

Answer 2

1

Question 3

What is the added to the weight of each car in the data set?

Answer 3

75kg (The mass of a driver)

Question 4

What is carbon emissions measured in?

Answer 4

g/km

Question 5

Example question

Jay collects data on the masses of vehicles first registered in 2002 taking a random sample of size 30.

Use your knowledge of the large data set to explain why Jay should clean the data before taking a sample

Answer 5

Some vehicles have a recorded mass of 0, therefore the data should be cleaned to remove these values.

Question 6

Example Question

Jay’s calculations show the mean mass of a vehicle in his sample is 1340 kg.

Using your knowledge of the large data set, estimate the mean mass of an empty vehicle in the whole database, justifying your answer.

Answer 6

1340 - 75 = 1265

Each driver has a recorded mass of 75kg.