From the set of 20 observations find the 50^th , 80^th and 90^th percentiles. 9,6,12,10,13,15,16,14,14,16,17,16,2 4,21,22,18,19,18,20,17 (6 marks).

first you list them in ascending order:-

6,9,10,12,13,14,14,15,16,16,16,17,17,18,18,19,20,21,22,24

The 50 th percentile = middle number = mean of 16 and 16

50th percentile = 16 Answer

80th percentile = 19 and 90th = 21

y=x+9

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step-by-step explanation:

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11 -1> 1 -1+ a

-12 > a