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3 marksMeasures of Central Tendency

CSEC Mathematics · January 2006 · Paper 2 · Question 7(g)

Calculate an estimate of the mean length of a student's right foot using the midpoints of the class intervals in (a) above.

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  1. 7(a)Copy and complete the following grouped frequency table for the data above. Length of Right Foot (cm): 14-16 (Frequency 4), 17-19, 20-22 (Frequency 8), 23-25…[2 marks]
  2. 7(b)State the lower boundary of the class interval 14-16.[1 mark]
  3. 7(c)State the width of the class interval 20-22.[1 mark]
  4. 7(d)A student's right foot measured 16.8 cm. State the class interval in which this length would lie.[1 mark]
  5. 7(e)A student was chosen at random from the group, and the length of his right foot was measured. Calculate the probability that the length was GREATER THAN or…[2 marks]
  6. 7(f)State the modal length of a student's right foot.[1 mark]

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