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Random Variables - Probability and Statistics (w/o mean and st. dev) Flashcards | StudBud
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Random Variables - Probability and Statistics (w/o mean and st. dev)
Random Variables - Probability and Statistics (w/o mean and st. dev)
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1
What is P( X < 1.5) ?
About .30
About .05
About .75
About .50
2
Discrete or Continuous: The number of cups of coffee that someone drinks each day
Probability
Continous
Discrete
Random
3
What is P (20 < X < 55)?
.82
.98
.65
.76
4
What kind of data is represented in the graph?
None
Continuous
Probability
Discrete
5
Draw a density curve with a length of 4. What is the height?
1/2
4
1/4
1
6
Which probability notation represents "at least 2"
P(X ≥ 2)
P(X< 2)
P(X≤ 2)
P(X= 2)
7
Discrete or Continuous: The amount of winnings from the Colorado lottery on a given day
Random
Probability
Discrete
Continuous
8
Which graph do you use when X = time it takes to run a mile?
HIstogram
Density Curve
Random
Continuous
9
What's the probability that a person has more than 3 credit cards?
.18
.11
.08
.03
10
Use the previous density curve. What is P( 1.5 < X < 3) ?
.5
.241
.456
.375
11
Which graph do you use when X = number of math majors per year at CSU?
Continuous
Discrete
Density Curve
Histogram
12
Discrete or Continuous:
The speed of a race car in mph
Neither
Discrete
Continuous
Discript
13
What kind of data is represented in the graph?
Continuous
Probability
None
Discrete
14
Use the previous density curve. What is P (X < 4) ?
.25
1
.25
.4
15
What is P (X < 30) ?
.15
.45
.37
.102
16
What is P(X < 44.1) ?
.5
.05
.15
.38
17
Use the previous density curve. What is P(X > 2.76) ?
.5
1
.375
.31
