The table gives information about the time spent, in minutes, by 50 people listening to the radio last Thursday.
| Time spent (x x\,x minutes) | Frequency |
|---|---|
| 0<x≤300 < x \leq 300<x≤30 | 12 |
| 30<x≤4030 < x \leq 4030<x≤40 | 25 |
| 40<x≤6040 < x \leq 6040<x≤60 | 8 |
| 60<x≤10060 < x \leq 10060<x≤100 | 5 |
Calculate an estimate for the mean time. You may use ∑fx=1855\sum fx = 1855∑fx=1855.
Calculate the estimate for the standard deviation of the distribution. Give your answer correct to 1 decimal place.
Practise Edexcel GCSE Statistics Standard Deviation with exam-style questions for Foundation and Higher tier. 10 questions, matched to the Edexcel GCSE Statistics (1ST0) 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.