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2 Statistics

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Question 350

One LDS9 record has the following blood-pressure readings, in mm Hg.

Reading123Systolic192192180Diastolic000\begin{array}{c|ccc}\text{Reading}&1&2&3\\\hline\text{Systolic}&192&192&180\\\text{Diastolic}&0&0&0\end{array}ReadingSystolicDiastolic​11920​21920​31800​​

The stored average values are 186 mm Hg for systolic pressure and 0 mm Hg for diastolic pressure.

a.

Verify the stored average systolic pressure.

[1]
b.

Identify the value that should be investigated during data cleaning.

[1]
c.

Explain why replacing this value immediately by the sample mean would not be justified.

[2]
Markscheme

2 Statistics Questions

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

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