#interdecile

S1 §2.3.9 (E) Exercise Q8 (IPR for grouped continuous data)

Exercise Q8. (E) A train travelled from Lancaster to Preston. The times, to the nearest minute, it took for the journey were recorded over a certain period. The times are shown in the table.Time for journey (minutes)Frequency15 – 16517 – 181019 – 203521 – 2210(a) Calculate the 5% to 95% interpercentile range. [3 marks](b) Estimate the number of data values that fall within this range. [1…