Test: Statistics Foundation I - Challenging

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Question 1:   Find the median of the data set   13,2,9,15,10,24,11 .
24
10
11
15
Question 2:   Find the median for the data   18,43,24,17,21,26 .
24
22.5
17
26
Question 3:   The arithmetic mean of   3.7   and   x   is   2.15 .  Find   x .
6
60
0.06
0.6
Question 4:   The arithmetic mean of the two numbers is   6.8 ,  and the arithmetic mean of the other ten numbers is   2.9 .  Find the arithmetic mean of these   12   numbers.
10
355
35.5
3.55
Question 5:   The arithmetic mean of   5   numbers is   6.9   and the arithmetic mean of the other two numbers is   6.2 .  Find the arithmetic mean of these seven numbers.
0.67
6.7
670
67
Question 6:   The arithmetic average of   3.7   and   x   is   2.15 .  Find   x .
0.6
60
0.6
6
Question 7:   The arithmetic mean of two numbers is   5.6 .  Find these numbers if one of them is   3.4   less than the other.
7.3   and   39
73   and   3.9
7   and   3
7.3   and   3.9
Question 8:   The first year from the field of   100   acres harvested   3510   tons of grain, the following year   3680   tons. What is the average yield per acre of this field?
3595 t acre
3.595 t acre
35.95 t acre
359.5 t acre
Question 9:   Find the arithmetic mean of fractions   21 13 , 29 18 , 31 13 , 25 18 .
0.175
175
17.5
1.75
Question 10:   The cyclist traveled at   18 km h   for   1   hour, then at   17.5 km h   for   2   hours, and at   18.2 km h   for the last   3   hours. At what average speed did the cyclist move?
17 14 15 km h
18 km h
17 km h
17 13 15 km h