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2 marksExperimental and Theoretical Probabilities

CSEC Mathematics · January 2006 · Paper 2 · Question 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 EQUAL to 20 cm.

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Other parts of this question

  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(f)State the modal length of a student's right foot.[1 mark]
  6. 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.[3 marks]

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