A) Random variable
B) Continuous random variable
C) Discrete random variable
D) Probability mass function

A) Probability mass function
B) Continuous random variable
C) Random variable
D) Discrete random variable

A) Probability mass function
B) Random variable
C) Continuous random variable
D) Discrete random variable

A) The time needed to finish a test.
B) The number of deaths per year attributed to motorcycle accidents.
C) The speed of a motorcycle.

A) The number of patients in a hospital.
B) The amount of paint used in repainting a building.
C) The average amount of electricity consumed.
D) The average weight of female athletes.

A) P(1) = 10/33, P(2) = 1/3, P(3) = 12/33
B) P(1) = 0.08, P(2) = 0.12, P(3) = 1.03
C) P(1) = 9/14, P(2) = 4/14, P(3) = 1/14
D) P(1) = 0, P(2) = 0.71, P(3) = 0.39

A) Random variables can only have one value.
B) The sum of all the probability distribution is always equal to one.
C) The probability of a random variable could be zero.
D) The value of a random variable could be zero.

A) 2, 3, 4
B) 0,2,3
C) 1,1,2
D) 1, 2, 3

A) b
B) d
C) c
D) a

A) The number of books in the library.
B) The lifetime in hours of 15 flashlights.
C) The weight of grade 1 pupils.
D) The number of tourists each day in a museum.

A) 2
B) 0
C) 1
D) 3

A) 1.2
B) 1.6
C) 1.8
D) 1.5

A) 0.75
B) 0.50
C) 1.00
D) 1.25

A) 1.12
B) 1.00
C) 0.71
D) 0.87

A) 3.5
B) 4.0
C) 2.0
D) 1.5

A) 4.15
B) 7.50
C) 8.00
D) 6.35

A) 6.35
B) 8.00
C) 4.15
D) 2.83

A) C
B) D

A) C
B) D

A) C
B) D

A) C
B) D

A) 0.5
B) 0.8
C) 0.3
D) 0.2

A) 6.1
B) 0.61
C) 3.2
D) 2.3

A) 0.781
B) 0.61
C) 6.1
D) 2.3

A) 0.781
B) 6.1
C) 0.61
D) 2.3

A) standard deviation
B) median
C) mean
D) variance

A) variance
B) mean
C) standard deviation
D) median

A) mean
B) standard deviation
C) median
D) variance

A) 2/3
B) 1/6
C) 1/3
D) 1/2

A) 12.29
B) 1.42
C) 2.01
D) 3.3

A) 1.42
B) 2.01
C) 3.3
D) 12.29

A) 0
B) 1
C) 100
D) 10

A) skewed right
B) uniform
C) bell-shaped
D) skewed left

A) 50%
B) 95%
C) 99.7%
D) 68%

A) 0.5
B) 2
C) 1
D) infinity

A) 95%
B) 68%
C) 99.7%
D) 100%

A) 1
B) 10
C) 0
D) 100

A) 100%
B) 50%
C) 25%
D) 75%

A) it has a long tail
B) it is assymetrical
C) it is symmetrical
D) it is skewed

A) Mean > Median > Mode
B) Mean = Median = Mode
C) Mean < Median < Mode
D) Mean ≠ Median ≠ Mode

A) 50%
B) 99.7%
C) 68%
D) 95%

A) Mean and standard deviation
B) Median and mode
C) Interquartile range
D) Variance and range

A) Changes the spread of the curve
B) No effect
C) Changes the shape of the curve
D) Shifts the curve left or right

A) No effect
B) Changes the height of the curve
C) Shifts the curve left or right
D) Changes the shape of the curve

A) The curve becomes more peaked
B) The curve becomes more spread out
C) The curve shifts to the left
D) The curve shifts to the right

A) 3/5
B) 3/8
C) 1/2
D) 5/8

A) c
B) b
C) d
D) a