Edexcel S1 2016 October — Question 1

Exam BoardEdexcel
ModuleS1 (Statistics 1)
Year2016
SessionOctober
TopicNormal Distribution
TypeSymmetric properties of normal

  1. The random variable \(X \sim \mathrm {~N} \left( \mu , \sigma ^ { 2 } \right)\)
Given that \(\mathrm { P } ( X > \mu + a ) = 0.35\) where \(a\) is a constant, find
  1. \(\mathrm { P } ( X > \mu - a )\)
  2. \(\mathrm { P } ( \mu - a < X < \mu + a )\)
  3. \(\mathrm { P } ( X < \mu + a \mid X > \mu - a )\)