The random variable X X\,X has the distribution X∼N(μ,σ2)X \sim N(\mu, \sigma^{2})X∼N(μ,σ2).
Identify the values of x x\,x at which the graph of the probability density function of X X\,X has its points of inflection.
Tick one box.
x=μx = \mux=μ only
x=μ±σx = \mu \pm \sigmax=μ±σ
x=μ±2σx = \mu \pm 2\sigmax=μ±2σ
x=0x = 0x=0 and x=μx = \mux=μ
390 exam-style questions on AQA A Level Maths 2.4 N: Statistical distributions, covering 2.4.1 Discrete distributions and the binomial, 2.4.2 The Normal distribution (A-level only), and 2.4.3 Selecting an appropriate distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.