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2 Statistics

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Question 498

A sensor records temperature x x\,x in degrees Celsius. Its readings have mean 18.4 and sample standard deviation 2.6. A converted reading is y=1.8x+32y=1.8x+32y=1.8x+32.

a.

Find the mean and sample standard deviation of yyy.

[2]
b.

Explain why adding 32 changes the mean but does not change the standard deviation.

[2]
Markscheme

2 Statistics Questions

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

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