Question

8. What is the value of the first quartile for observations 15, 18, 10, 20, 23, 28, 12, 16?
(a) 17
(b) 16
(12.75
(d) 12
9. The third decile for the numbers 15, 10, 20, 25, 18, 119, 12 is
(a) 13
b) 10.70
(c) 11
(d) 11.50
10. If there are two groups containing 30 and 20 observations and having 50 and 60 as
arithmetic means, then the combined arithmetic mean is
(a) 55
(b) 56
(c) 54
(d) 52.
​

Answer 1

Answer:

8) (d) 12

9) (c) 11

10) (a) 55

Answer 2

Answer:

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