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Chapter 5 Review: Probability and Statistics Flashcards | StudBud
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Chapter 5 Review: Probability and Statistics
Chapter 5 Review: Probability and Statistics
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Answers
1
What kind of Probability Density Function (PDF) is this?
Binomial PDF
Uniform PDF
Normal PDF
THEE standard normal PDF
2
By the Empirical Rule about 68% of the area under a normal curve is within two standard deviations of the mean.
False
True
3
Is this random variable discrete or continuous?
Continuous
Discrete
4
Is this random variable discrete or continuous?
Discrete
Continuous
5
The standard normal distribution ALWAYS has a mean of 0 and a standard deviation of 1
True
False
6
The area under all probability density functions is equal to 1.0
True
False
7
If the domain of a uniform continuous probability density function is 7.0 < X < 35.0, then its height is
1/28
1/42
1/7
35
8
if X is a continuous random variable what is P(X = 0.25)?
P(X = 0.25) = 0.25
P(X = 0.25) = 0.16
P(X = 0.25) = 1.0
P(X = 0.25) ≈ 0
9
Is this random variable discrete or continuous?
Discrete
Continuous
10
Find P(2.5<X<5.5)
3/10 =0.3
1/3 = 0.3333
2.5/3.5 = 0.7143
2/4 = 0.5
11
In a uniform probability Distribution the probabilities for all outcomes are equal
True
False
12
The Area under the curve of a Probability Density Function (PDF) is the same as Probability
False
True
