
Unit 9 Review
Authored by Caleb Rogers
Mathematics
12th Grade
Used 2+ times

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32 questions
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1.
DROPDOWN QUESTION
1 min • 4 pts
A (a) is a variable which represents the outcome of a randomized trial or event. A random variable can take any value within a pre-determined range and is different for each trial.
• A (b) has a finite or countable set of possible values. For any two consecutive possible values, there is a minimum distance over which the random variable cannot be equal to anything in between.
• This contrasts from a (c) , which can take an infinite and uncountable set of possible values.
• There is a common perception that discrete values must be natural numbers. However, this is not true. In certain contexts, (d) .
2.
CATEGORIZE QUESTION
3 mins • 3 pts
Which of the following random variables are discrete?
Groups:
(a) Discrete Variables
,
(b) Non-Discrete Variables
Practices held before championship
Distance run on a track
Width of each lane on the track
Height of each hurdle
Participants from each school in track championship
Average speed of all runners
Time it takes to run a lap
Hurdles cleared in one lap
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Tara goes swimming 80% of the time in the summer. Let X = the number of days Tara swims in a 4-day period. What is the probability distribution of X=2?
4.
DRAG AND DROP QUESTION
1 min • 5 pts
A (a) of a discrete random variable lists all possible outcomes for a trial and their respective probabilities. The distribution must include probabilities that:
• Are between (b) (inclusive).
• Sum to exactly (c) .
• To create a probability distribution for a discrete random variable, calculate the probability of each possible value.
This may include listing (d) of certain events, (e) of specific successes/failures, accounting for multiple ways to get identical results, and/or applying contextual information.
5.
DROPDOWN QUESTION
1 min • 1 pt
A (a) is a bar chart representing the probability of each possible value of a discrete random variable.
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
P(X=0)
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
P(X=1)
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