Probability, Random Variables, and Probability Distributions
Given two mutually exclusive events with nonzero probabilities, how does increasing the sample size affect the accuracy of empirical probabilities approximating true probabilities?
It increases accuracy due to the Law of Large Numbers.
It decreases accuracy because variability increases.
It has no effect as empirical probabilities don't change with sample size.
It decreases accuracy by making events less mutually exclusive.
If an observational study finds a strong correlation between the number of fire trucks at a scene and the amount of damage done by a fire, which explanation most plausibly accounts for this relationship?
The number of fire trucks is determined by a random process independent from the fire's severity.
Firefighters call in more trucks when they cause too much damage.
The severity of the fire causes more fire trucks to be present and also results in more damage.
The presence of more fire trucks leads to firefighters causing more damage.
In a deck containing red black cards only where no card can both colors by simple chance if selecting card has probabilty choosing another has what's overall pull out distinct pairs?
In a sample space with mutually exclusive events A and B, if , what is ?
0.6
0.2
0.4
0.3
Given that event C has a probability of occurrence of 0.7, which scenario is possible for a non-empty event D if C and D are mutually exclusive?
P(D) < 0.3
P(C or D) = P(C) + P(D)
P(D) > 0.7
P(D) = -0.2
If and , what is the probability of either event A or event B occurring if A and B are mutually exclusive?
0.4
0.8
0.2
1
In which type of non-random sample do members self-select to participate in a study or survey?
Snowball Sampling
Non-probability Sampling
Voluntary Response Sampling
Judgemental Sampling

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If pulling card X from Deck Y makes Event A occur with a certainty (probability =1), and pulling any other card makes Event B occur with certainty, what is P(Event A and Event B)?
Impossible (probability =0)
Cannot be determined without additional information about Deck Y.
When flipping two different coins, what is the probability that at least one coin will land on heads?
\frac{12 \times}{\frac{14}}
What is the probability of either event A or event B occurring if they are mutually exclusive and P(A) = 0.20, while P(B) = 0.30?
Cannot be determined with given information.
0.60
0.50
0.50