Mathematics 7357: Statistical Hypothesis Testing Topical Past Paper Questions

(a) (iii) In his random sample, Talat finds 18 cars with CO emissions less than 0.3 g/km. State Talat's conclusion in context. [1 mark] (b) Talat now wants to use his random sample of 25 diesel cars, registered in 2022, to investigate whether the proportion of diesel cars in Engl…

The mass of aluminium cans recycled each day in a city may be modelled by a normal distribution with mean 24500kg and standard deviation 5200kg. ) State the probability that the mass of aluminium cans recycled on any given day is not equal to 24500 kg. [1 mark] (b) To reduce cost…

A bank runs a campaign to promote Internet banking accounts to their customers. Before the campaign, 42% of their customers had an Internet banking account. One week after the campaign started, 35 customers were surveyed at random and 18 of them were found to have registered for…