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IB Mathematics: Applications and Interpretation HL · AHL 8: Statistics 2 · AHL 8.6

Linear combinations and the sample mean Problem set A Answers

Skills

    1. (a) 2
    2. (b) 11
    3. (c) 36
    1. (a) 15.5
    2. (b) 14

  3. mean 250 g, sd 1.6 g

  4. \(E(S)=9\), \(\mathrm{Var}(S)=8.1\)

  5. mean 0, sd 0.0707 s

In context

  1. mean 9.5 cm, sd 0.539 cm

  2. mean 3109 g, sd 12.2 g

  3. mean 2329 kg, sd 20.4 kg

  4. mean 42 minutes, sd 15.7 minutes

Stretch

  1. mean 0, sd 4.02

  2. 6 g

  3. 63

  4. 4

jmaths.xyz · AI HL · AHL 8.6 Mixed practice: linear combinations and the sample mean