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

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

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

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

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) = 0, P(2) = 0.71, P(3) = 0.39
D) P(1) = 9/14, P(2) = 4/14, P(3) = 1/14

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

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

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

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

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

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

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

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

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

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

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

A) C
B) D

A) D
B) C

A) D
B) C

A) C
B) D

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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