Stats: Review Chapter 9 - Random Variables
Authored by Diana Boehmer
Mathematics
12th Grade
CCSS covered
Used 2+ times
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19 questions
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1.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Suppose you toss a fair coin 4 times. Let X = the number of heads you get. Find the probability distribution of X (in order).
X = 1, 2, 3, 4
X = 0, 1, 2, 3, 4
P(X) = 0.0625, 0.25, 0.375, 0.25, 0.0625
P(X) = 0.071, 0.286, 0.286, 0.286, 0.071
P(X) = 0.5, 0.25, 0.125, 0.0625
Tags
CCSS.HSS.MD.A.3
CCSS.HSS.MD.A.4
2.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
Suppose you toss a fair coin 4 times. Let X = the number of heads you get. Find P(X ≤ 3).
(a)
Tags
CCSS.HSS.CP.A.1
CCSS.HSS.MD.A.3
CCSS.HSS.CP.B.7
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Suppose you toss a fair coin 4 times. Let X = the number of heads you get. Describe the probability, P(X ≤ 3), in words.
There is a 93.75% chance of flipping 3 heads.
There is a 93.75% chance of flipping no heads.
There is a 93.75% chance of flipping less than 4 heads.
There is a 0.9375% chance of flipping less than 4 heads.
Tags
CCSS.HSS.CP.A.1
CCSS.HSS.CP.B.7
4.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
If X = the number of televisions in a randomly selected U.S. household, the probability distribution of X is given here. Is X a discrete or a continuous random variable? Explain.
Discrete
Continuous
There are gaps between the values of X.
There are no gaps between the values of X.
Tags
CCSS.HSS.MD.A.1
5.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
If X = the number of televisions in a randomly selected U.S. household, the probability distribution of X is given here. Find P(X < 2).
(a)
Tags
CCSS.HSS.CP.A.1
CCSS.HSS.MD.A.1
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
If X = the number of televisions in a randomly selected U.S. household, the probability distribution of X is given here. Describe the probability, P(X < 2), in words.
There is a 0.28% chance that a randomly selected US home has less than 2 tv's.
There is a 28% chance that a randomly selected US home has no more than 1 tv.
There is a 28% chance that a randomly selected family has no more than 1 tv.
There is a 61.1% chance that a randomly selected US home has less than 2 tv's.
Tags
CCSS.HSS.CP.A.1
CCSS.HSS.MD.A.1
CCSS.HSS.IC.A.1
7.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
If X = the number of televisions in a randomly selected U.S. household, the probability distribution of X is given here. What is the probability that a randomly selected household has at least 2 televisions?
(a)
Tags
CCSS.HSS.CP.A.1
CCSS.HSS.MD.A.1
CCSS.HSS.MD.A.3
CCSS.HSS.CP.B.7
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