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Probability and Statistics Flashcards | StudBud
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Probability and Statistics
Probability and Statistics
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1
What is the calculator method for a normally distributed problem?
2nd Trace 5
2nd Graph
2nd VARS 2
2nd Window Ask
2
What is the variable for standard deviation
x
s
P
t
3
What is the margin of error formula?
\frac{AandB}{B}
A and B = AB
x+2s
2s
4
Conditional Probability
57%
26.7%
33%
44.4%
5
What is the confidence interval formula
two times s
A and B equals A times B
mean plus/minus 2 times the standard deviation
A given B equals A and B over B
6
What is the key word for confidence interval?
mean
normally distributed
margin or error
95%
7
The events are independent.
1.23
.808
.17
.641
8
What variable represents mean?
μ
s
p
i
9
Salaries normally distributed w/ mean of 50,000 & S.D. of 20,000. What % earn 70,000 & 90,000?
14%
13%
13.5%
16.5%
10
If two events are independent then
P(A or B) = P(A) x P(B)
P(A and B) = P(A) x P(B)
P(A and B) = P(A) + P(B)
P(A or B) = P(A) + P(B) - P(A and B)
