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Prob & Stats ch 5 (now 6) review, uniform & normal Flashcards | StudBud
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Prob & Stats ch 5 (now 6) review, uniform & normal
Prob & Stats ch 5 (now 6) review, uniform & normal
20 terms
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StudBud Administration
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Let's answer these normal & uniform calculations quickly with our TI-84's. Go Lakers.
Flashcards
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Practice quiz
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Questions
20
Answers
1
Find k if P(-k<z<k) = 0.3830
0.55
0.65
0.50
0.60
2
P(z<0) =
0.05
68%
0.5
1
3
In a uniform distribution, if the base length is 20, the P(x)=
0.5%
0.5
0.05%
5%
4
All the following are key themes except...
The central tendency
The dispersion statistics
The central intelligence agency
The distribution shape
5
If the mean is 49 and s = 25, what is the new standard deviation if you have a GROUP of 9?
49/9
49/3
25/9
25/3
6
Find the z-score for P
22
-0.82
-0.85
0.77
-0.77
7
In a uniform distribution, if the base length is c, then P(x)=
100%
E=mc2
1/c
c
8
When the percentile is less than 50, the z score must be
Negative
0.5
Zero
Positive
9
When the normal approximates the binomial, what is the correction factor if you want x<3
2<x<3
x<3
x<2.5
x<3.5
10
Find the raw score, x, for the eightieth percentile when the mean is 100 and s = 20
116.8
115.8
118.8
117.8
11
Find k: P(z<k) = 0.9279
1.43
1.51
1.46
1.41
12
Find the raw score of P
99
if the mean is 21 and the s = 4.9
32.4
32.8
31.8
31.4
13
All of the following are conclusions of the Central Limit Theorem except...
The standard deviations shrinks to s/n
The mean of the sample means approaches the real mean
The sample distributions approach normal
The standard deviation shrinks to s/n0.5
14
All of these are traits of a binomial experiment except...
2 outcomes
Known n
Constant probability
Dependent events
15
Use 2nd vars to quickly find (1.11<z<2.55)
0.125
0.132
0.130
0.128
16
Which is Uncle Mark's favorite child?
Lydia
Daniel
Hannah & Priscilla (tie)
Aaron
17
A class had a mean of 90 and s = 6. Use your TI-84 to find P(x>95)
0.2011
0.2067
0.2048
0.2023
18
If n = 10 and you have distinct scores, what is the top scorer's percentile?
100
99
95
90
19
If the mean is 1000 and s = 170, find the score for P
30
911
915
919
904
20
When the normal approximates the binomial, what is the correction factor if you want at least 7
x>7
x>7.5
x>6.5
x<6.5
