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Statistics: Data Description and Probability Flashcards | StudBud
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Statistics: Data Description and Probability
Statistics: Data Description and Probability
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Answers
1
The value of nCn is
1
True
False
2
When two dices are rolled, the sample space consists of how many events?
60
6
12
36
3
The Formula for weighted mean is
Xbar=ΣX/n
χbar = ΣwX/Σw
MR=lowest value+highest value/2
μ=ΣX/N
4
Which of these exam grades has a better relative position?
A grade of 56 on a test with Χbar = 60 , s = 5
A grade of 82 on a test with Χbar = 85 , s = 6
5
The formula for the
Coefficient of Variation
:
z = χ-μ/δ
Cvar = (μ∕δ)×100
1-1/k2
Cvar = (δ∕μ)×100
6
Which data set is the most variable?
Mean = 33, Standard Deviation = 11
Mean = 7, Standard Deviation = 2
Mean = 43, Standard Deviation = 8
Mean = 16, Standard Deviation = 5
7
The ...................... represents the
number of Standard Deviations that a data value falls above or below the mean
.
Standard Score (z score)
Interquartile Range
Variation
Percentile
8
what is the number of permutations of 6 different objects taken all together?
0
Undefind
36
720
9
Standard Deviation divided by the mean
is defined as the.......................................
Variance
Outlier
Coefficient of Variation
Standard Score (z score)
10
What is the outlier for the set 321, 343, 350, 327, 200?
none
321
350
200
11
What is the outlier for the set 24, 32, 54, 31, 16, 18, 19, 14, 17, 20?
31
24
32
54
12
How many ways can 5 sopranos and 4 alots be selected from 7 sopranos and 9 altos?
2332
1167
2646
4594
13
The formula for the
Standard Score
:
s2 = n(Σχ2)-(Σχ)2/n(n-1)
c = (n×p)/100
s ≈ range/4
z = χ-μ/δ
14
What is the Outlier for the set 16, 18, 22, 19, 3, 21, 17, 20?
22
3
16
20
