Math topic中文

Concept

Concept of a normal distribution as an example of a continuous probability model and its mean and variance; use of N(μ,σ2)\mathrm{N}(\mu,\sigma^2)N(μ,σ2) as a probability model.

Practice questions

  1. 1设随机变量XXX服从正态分布N(4,σ2)N(4,σ^{2})N(4,σ2)，若P(X<a−3)=P(X>a+1)P(X< a-3)=P(X>a+1)P(X<a−3)=P(X>a+1)，则aaa的值为()(\quad)() A. 333 B. 444 C. 555 D. 666