Question

Pupils were asked how long it took them to walk to school on a particular morning....

  1. Pupils were asked how long it took them to walk to school on a particular morning. A cumulative frequency distribution was formed.

Time taken (minutes)

<5

<10

<15

<20

<25

<30

<35

<40

<45

Cum. Frequency

28

45

81

143

280

349

374

395

400
  1. Draw a cumulative frequency curve and estimate how many pupils took less than 18minutes.
  2. 6% of the pupils took x minutes or longer. Find x.
  3. Construct the frequency distribution and draw histogram.
Math   Statistics-And-Probability   
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