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Poisson and Normal Distributions Review Flashcards | StudBud
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Poisson and Normal Distributions Review
Poisson and Normal Distributions Review
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A few probability distribution questions #probabilitydistributions #statistics #ncea
Flashcards
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Questions
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Answers
1
Which is not a feature of the normal distribution?
95% of values lie 2 standard deviations away from the mean
Most of the data is within 3 standard deviations of the mean
mean = median
bell-shaped and unimodal
2
X is a discrete random variable with the probability distribution below. Estimate E(X)
1.7
1.5
0.9
1.1
3
An airline lose an average of 6 bags per flight. Find P(lose
less than
5 on the next flight)
0.1339
0.4457
0.1606
0.2851
4
If Z is normally distributed with a mean of 0 and a standard deviation of 1, which is false?
P(Z=0)=0
P(-3<Z<3)=0.97
P(-1<Z<1)=0.68
P(-2<Z<2)=0.95
5
What is the probability the airline loses more than 2 bags?
P(X>=2)
1-P(X<=2)
P(X<2)
1-P(X<2)
6
An airline lose an average of 6 bags per flight. What is the pr. the airline loses
exactly
3?
0.050
0
0.089
0.151
7
An airline lose an average of 6 bags per flight. The probability they lose less than 2 is...
P(X>2)
P(X<=1)
P(X<3)
1-P(X<2)
8
Lose an average of 3 bags per flight. Find P(lose
none
on the
next two flights
)
0.0248
0.00248
0.4232
0.0498
