factorise x^2+?x+?
Post on 23-Jun-2022
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5.1
𝑿 1 2 3 4
𝑃(𝑋 = 𝑥) 0.2 0.3 0.4 𝑘
5.2
5.3
5.4
𝑿 40-44 45-49 50-59 60-79
𝑓 12 17 5 2
A random sample of 30 students each recorded the number, 𝑥,
of videos they watched during a 3 week period. The results
are summarised as: 𝑥 = 407, 𝑥2 = 6535 Calculate the standard deviation of this data.
5.5
The random variable 𝑋 has a cumulative function
𝐹 𝑥 =3𝑥−1
8 for x = 1, 2, 3
Find the probability distribution of 𝑋
5.6
5.7
5.7a
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