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Question 108

A population is Normally distributed with mean 82 and standard deviation 5. A random sample of size 12 is taken and its mean is denoted by Xˉ\bar XXˉ.

a.

State the distribution of Xˉ\bar XXˉ.

[2]
b.

Find P(Xˉ<80)P(\bar X<80)P(Xˉ<80).

[1]
Markscheme

2 Statistics Questions

  1. A Level
  2. /Maths
  3. /2 Statistics

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