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quiz 2
quiz 2
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Answers
1
Statistics are useless since you can design an experiment to prove anything you want to prove statistically.
True
False
2
Find the range of the following dataset:
x=[2,−5,−7,−10, 6]
16
8
-16
-8
3
The mean of the set
{27,14,11,23,x}
is 20. What is the mean of the set
{x,2x,11,8,31}
?
20
18
25
19
4
What is the mean of 44, 22, 134, and 200?
100
95
90
110
5
Consider the following numbers:
42, 51, 62, 47, 38, 50, 54, 44 The value 48.5 represents:
(Reorder as an ascending order)
the median
neither the median nor the mean
both the mean and the median
the mean
6
If the average of
3
numbers is
6
and the average of
5
numbers is
7
, what is the average of all the numbers?
5.525
6
6.625
13/8
7
The class average in a class of 15 is 86%If one additional student earns 100% in the class what is the new class average
85.875
86
86.875%
86.25
8
What is the probability of spinning green?
3/11
5/11
3/4
1/4
9
Which of the following data sets has exactly one mode regardless of the value of
N
?
{7,8,9,10,10,11,11,13,N}
{1,2,3,4,5,6,7,8,9,N}
{3,7,8,9,10,10,10,10,11,11,13,N}
{9,10,10,10,10,11,11,13,N,N}
10
What is the range of the following equation?
3x+2
where
3≤x<10
19
18
23
21
11
Ali's score{87,79,95,91}first four exams in math. What is the minimum score he must get to show totally result 90+
92
98
95
82
