Answer to Question #311375 in Statistics and Probability for joy

Question

There are 150 students in a class. The distribution if their marks in a mathematics test are as follows

Class frequency

0-9 3

10-19 10

20-29 17

30-39 x

40-49 35

50-59 y

60-69 18

70-79 10

80-89 5

90-99 2

Required

Use the ogive to estimate

i) The 8th decile (2marks)

ii) The 7-th percale (2marks)

iii) The lower quartile

Answer 1

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