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DSAI Week 3 Day 1 Morning: Probability and Statistics Flashcards | StudBud
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DSAI Week 3 Day 1 Morning: Probability and Statistics
DSAI Week 3 Day 1 Morning: Probability and Statistics
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Pre-test in basic probability and statistics
Flashcards
15 cards
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Practice quiz
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Questions
15
Answers
1
Probability of an event that may
depend on the occurrence or non-occurrence of another event
.
Disjoint Probability
Conditional Probability
Exclusive Probability
Sequential Probability
2
A die is rolled, find the probability that an
odd number
is obtained.
20%
10%
50%
50
3
These are examples of business problems that are probabilistic in nature
except:
Likelihood of buying product B, given that he/she bought product A.
Likelihood of my employees staying.
Predicting volume of bank deposits based on customer demographics.
Predictingthe likelihood of our customer churning.
4
TRUE OR FALSE: In Bayesian statistics,
Tests are not the event.
False
True
5
Is the
chance
that something will happen — how likely it is that some event will happen.
Possibility
Impossibility
Probability
Improbability
6
TRUE OR FALSE:
False positives skew results.
False
True
7
TRUE OR FALSE:
Even data science is a test.
False
True
8
Two coins are tossed, find the probability that
two tails
are obtained.
100%
25%
50%
75%
9
Who is your DSAI instructor for today?
Xavier Puspus
Xavier Francis
Xavier Asisi
Xavier Charles
10
Given
2 black
and
3 red,
find the probability of
picking red and then black
(without replacement).
66.66%
33%
30%
50%
11
Which of these numbers
cannot
be a probability?
0.5%
100%
-40%
125%
12
TRUE OR FALSE: Solutions to many data science problems are often
probabilistic
in nature.
True
False
13
TRUE OR FALSE:
Tests are not flawed.
False
True
14
TRUE OR FALSE: Probability is a number between 0 and 1, where 0 indicates
certainty
and 1 indicates
impossibility
.
False
True
15
Read problem from image below. You have
90 seconds
to solve it. (Hint: Can be done mentally)
Cannot say
50%
1/10,000
99.99%
