Study text: "Essential Mathematics and Statistics for Science", 2nd Edition,

G Currell & A A Dowman, Wiley-Blackwell, 2009

G Currell & A A Dowman, Wiley-Blackwell, 2009

- The four figures show where the five arrows from each of four archers, A, B, C and D, hit their target. The performance of each archer can be reported using the descriptions -
**accuracy**and**precision**.

Note that some scientists use ‘**accuracy**’ to describe how close the**average**of the experimental values is to the ‘true’ value, and ‘**precision**’ to describe how closely together the values are bunched.Archer A Archer B Archer C Archer D **Select ALL**of the following statements that would be completely correct:

(Click here for the Video Answer - The four figures show where the five arrows from each of four archers, A, B, C and D, hit their target.
Archer A Archer B Archer C Archer D **Select ALL**of the following statements that would be completely correct:

(Click here for the Video Answer - The four figures show where the five arrows from each of four archers, A, B, C and D, hit their target.
Archer A Archer B Archer C Archer D

On the basis of these samples of five arrows each, you need to assess the relative probabilities with which each archer is likely to hit the centre of the target with their next arrow. Rank the archers, from the most probable to the least probable.**Select the ONE**correct order:- A, B, D, C
- A, D, B, C
- A, D, C, B
- A, B, C, D

- Four analysts, A, B, C and D, each make five replicate measurements of the alcohol level in a blood sample which has a true value of 80 mg per 100 mL.

The numerical values of their results are given in the table below, together with the average values of each data set and a measure of the ‘spread’ of the data using a statistic called ‘standard deviation’.Analyst Average St Dev A 82.5 81.9 82.3 81.7 82.1 82.1 0.32 B 79.8 79.8 79.6 80.2 79.8 79.8 0.22 C 79.5 78.7 79.0 82.7 79.5 79.9 1.61 D 80.2 80.2 74.3 76.9 76.2 77.6 2.59 **Select ALL**of the following statements that would be completely correct:

(Click here for the Video Answer