Barry recorded the times, in seconds, taken by some students to run a race.
The times taken by the students are normally distributed with mean 52.6 seconds and standard deviation 2.7 seconds.
Jenny's time for the race is 49.2 seconds.
Calculate Jenny's standardised time.
Give your answer to 2 decimal places.
Toby's standardised time is -1.20.
Who did better in the race, Jenny or Toby?
You must explain your answer.
Practise AQA GCSE Statistics Standardised Scores with exam-style questions for Foundation and Higher tier. 6 questions, matched to the AQA GCSE Statistics (8382) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.