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Interactive Grade 8 Maths Statistics Test

Maths · Grade 8 · 15 questions · 10 min

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1.
Scores: 85, 24, 55, 39, 40, 82, 18. What score gives mean = 50 after 8 values?
2.
Find the MEAN of: 22, 41, 19, 43, 49, 21 (round to nearest whole)
3.
Points: (1,9), (2,5), (3,1), (4,-3), (5,-7)
This scatter plot shows ___ correlation.
4.
Lower quartile (Q1) of: 8, 22, 25, 27, 28, 29 = ___
5.
Points on a scatter plot:
(1,7), (2,9), (3,11), (4,13), (5,15)
As x increases, y ___
6.
Points: (1,7), (2,3), (3,-1), (4,-5), (5,-9)
This scatter plot shows ___ correlation.
7.
Data: 5, 15, 18, 23, 35, 46
Q1=15, Q3=35. IQR = ___
8.
Scores: 67, 33, 51, 55, 50, 53, 43. What score gives mean = 51 after 8 values?
9.
Find the MEAN of: 49, 46, 15, 17, 16, 42 (round to nearest whole)
10.
Find the MEDIAN of: 6, 16, 17, 18, 31, 31, 34
11.
Lower quartile (Q1) of: 22, 25, 30, 30, 36, 40 = ___
12.
Points: (1,10), (2,8), (3,6), (4,4), (5,2)
This scatter plot shows ___ correlation.
13.
Points on a scatter plot:
(1,13), (2,18), (3,23), (4,28), (5,33)
As x increases, y ___
14.
Scores: 75, 50, 21, 89, 50, 44. What score gives mean = 55 after 7 values?
15.
Data: 27, 31, 16, 16, 24. What is the mean?