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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A) C
B) D

A) D
B) C

A) D
B) C

A) D
B) C

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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