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2 Statistics

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Question 236

A histogram represents 90 observations. The intervals 0<x≤100<x\leq100<x≤10, 10<x≤15 10<x\leq15\,10<x≤15 and 15<x≤30 15<x\leq30\,15<x≤30 have densities 2, k k\,k and 3 respectively.

a.

Find kkk.

[4]
b.

Find the proportion in 10<x≤1510<x\leq1510<x≤15.

[1]
Markscheme

2 Statistics Questions

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

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