The concentration of a specific catalyst, C C\,C mg/L, in a chemical reaction follows a normal distribution where C∼N(μ,12.52)C \sim N(\mu, 12.5^2)C∼N(μ,12.52). Observations show that the catalyst concentration exceeds 145.6 mg/L in only 8.85% of trials.
Determine the value of the mean concentration μ\muμ.
Find the probability that the catalyst concentration in a randomly selected trial lies between the mean and 145.6 mg/L.
21 exam-style questions on Edexcel A Level Maths 3.3 The Inverse Normal Distribution Function. Each one has a worked solution and a mark scheme showing where the marks go.