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Questions and Answers
Which of the following is NOT a requirement for a procedure to represent a binomial distribution?
Which of the following is NOT a requirement for a procedure to represent a binomial distribution?
- The trials must be independent.
- The probability of a success must vary across trials. (correct)
- The procedure has a fixed number of trials.
- Each trial must result in one of two outcomes.
If a procedure has a sample size that represents 10% of the total population, how should the trials be treated?
If a procedure has a sample size that represents 10% of the total population, how should the trials be treated?
- As independent events.
- As continuous events.
- As dependent events. (correct)
- As mutually exclusive events.
In a binomial probability distribution, what does the symbol 'n' represent?
In a binomial probability distribution, what does the symbol 'n' represent?
- The number of successes in trials.
- The total number of trials conducted. (correct)
- The probability of failure.
- The probability of success.
Which of the following best describes the concept of 'success' in a binomial probability distribution?
Which of the following best describes the concept of 'success' in a binomial probability distribution?
What does the letter 'p' signify in the notation of binomial probability distributions?
What does the letter 'p' signify in the notation of binomial probability distributions?
In a binomial distribution, if the probability of failure is denoted by 'q', how is it mathematically expressed in terms of 'p'?
In a binomial distribution, if the probability of failure is denoted by 'q', how is it mathematically expressed in terms of 'p'?
Why must the trials in a binomial distribution be independent?
Why must the trials in a binomial distribution be independent?
In determining the probability of an event in a binomial distribution, what might need to be considered to establish the value of 'p'?
In determining the probability of an event in a binomial distribution, what might need to be considered to establish the value of 'p'?
What does P(x) represent in a Binomial Probability Distribution?
What does P(x) represent in a Binomial Probability Distribution?
Which of the following values represents the probability of failure in a Binomial experiment where the probability of success is 0.75?
Which of the following values represents the probability of failure in a Binomial experiment where the probability of success is 0.75?
How can the probability of getting less than 6 heads in 20 coin tosses be identified using Binomial functions?
How can the probability of getting less than 6 heads in 20 coin tosses be identified using Binomial functions?
In the given experiment with 5 offspring peas, what is the probability of getting exactly 3 green pod offspring?
In the given experiment with 5 offspring peas, what is the probability of getting exactly 3 green pod offspring?
Which is NOT a condition when using the Binomial Probability Distribution?
Which is NOT a condition when using the Binomial Probability Distribution?
When sampling without replacement, under what condition can the events be considered independent?
When sampling without replacement, under what condition can the events be considered independent?
What is the correct sequence to input values into a TI-83 when using the binompdf function?
What is the correct sequence to input values into a TI-83 when using the binompdf function?
The cumulative distribution function (CDF) for a binomial probability distribution is represented by which notation?
The cumulative distribution function (CDF) for a binomial probability distribution is represented by which notation?
What is the probability of getting at least 14 heads when tossing a coin 32 times?
What is the probability of getting at least 14 heads when tossing a coin 32 times?
In a class of 25, what is the probability that exactly 1 person is allergic to bee stings?
In a class of 25, what is the probability that exactly 1 person is allergic to bee stings?
Calculate the probability that fewer than 3 students in a class of 9 receive financial aid, given that 53% of students receive financial aid.
Calculate the probability that fewer than 3 students in a class of 9 receive financial aid, given that 53% of students receive financial aid.
When finding the probability that 4 or more people in a class of 25 are allergic to bee stings, which method should be used?
When finding the probability that 4 or more people in a class of 25 are allergic to bee stings, which method should be used?
What conditions must be satisfied for a procedure to qualify as a binomial distribution?
What conditions must be satisfied for a procedure to qualify as a binomial distribution?
Given the scenario, what represents the parameters for a binomial distribution where 571 subjects out of 863 said 'yes'?
Given the scenario, what represents the parameters for a binomial distribution where 571 subjects out of 863 said 'yes'?
If the probability of receiving financial aid is 53%, what is the probability of exactly 5 students receiving it in a group of 9?
If the probability of receiving financial aid is 53%, what is the probability of exactly 5 students receiving it in a group of 9?
What is the probability that at least 14 out of 32 coin tosses yield heads?
What is the probability that at least 14 out of 32 coin tosses yield heads?
Is the scenario of treating 152 couples with YSORT gender selection method a binomial distribution?
Is the scenario of treating 152 couples with YSORT gender selection method a binomial distribution?
In the scenario involving 20 Senators, which factor contributes to the situation not being a binomial distribution?
In the scenario involving 20 Senators, which factor contributes to the situation not being a binomial distribution?
Given the scenario where n = 12, x = 10, and p = 3/4, what is the probability of exactly 10 successes?
Given the scenario where n = 12, x = 10, and p = 3/4, what is the probability of exactly 10 successes?
What does the 5% guideline refer to in the context of probability sampling?
What does the 5% guideline refer to in the context of probability sampling?
What is one condition that must be met for a procedure to be classified as having a binomial distribution?
What is one condition that must be met for a procedure to be classified as having a binomial distribution?
What are the values of n, x, p, and q in the context of the binomial distribution if n = 20, x = 4, and p = 0.15?
What are the values of n, x, p, and q in the context of the binomial distribution if n = 20, x = 4, and p = 0.15?
What is a characteristic of the binomial probability formula?
What is a characteristic of the binomial probability formula?
Why can't the 5% guideline be applied in the Senate example?
Why can't the 5% guideline be applied in the Senate example?
What is the probability that at least one of the 5 donors has Group O blood?
What is the probability that at least one of the 5 donors has Group O blood?
If the probability of getting heads in 20 coin tosses is studied, what is the probability of getting exactly 9 heads?
If the probability of getting heads in 20 coin tosses is studied, what is the probability of getting exactly 9 heads?
In a class of 25 people with a 1% allergy rate, what is the probability that exactly 1 person is allergic to bee stings?
In a class of 25 people with a 1% allergy rate, what is the probability that exactly 1 person is allergic to bee stings?
What is the probability that at least 7 out of 10 consumers recognize the Mrs.Fields brand?
What is the probability that at least 7 out of 10 consumers recognize the Mrs.Fields brand?
What is the probability of getting less than 6 heads in 20 coin tosses?
What is the probability of getting less than 6 heads in 20 coin tosses?
In a random group of 9 students, what is the probability that exactly 5 of them receive financial aid?
In a random group of 9 students, what is the probability that exactly 5 of them receive financial aid?
What is the probability of obtaining at least 3 out of 5 people who have heard of McDonald's?
What is the probability of obtaining at least 3 out of 5 people who have heard of McDonald's?
What is the probability that 4 or more individuals in a class of 25 are allergic to bee stings?
What is the probability that 4 or more individuals in a class of 25 are allergic to bee stings?
Flashcards
Binomial Probability Distribution
Binomial Probability Distribution
A probability distribution that results from a procedure with a fixed number of independent trials, where each trial has two possible outcomes (success or failure), and the probability of success remains constant for each trial.
Fixed Number of Trials
Fixed Number of Trials
A characteristic of a binomial distribution; the total number of trials in the procedure is predetermined and unchanging.
Independent Trials
Independent Trials
In a binomial distribution, the outcome of one trial does not affect the outcome of any other trial. If the sample size is less than 5% of the population, it's often treated as independent.
Success/Failure Outcomes
Success/Failure Outcomes
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Constant Probability of Success
Constant Probability of Success
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Notation: p
Notation: p
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Notation: q
Notation: q
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Notation: n
Notation: n
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Notation: x
Notation: x
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Binomial Probability
Binomial Probability
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Probability of success (p)
Probability of success (p)
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Probability of failure (q)
Probability of failure (q)
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Number of trials (n)
Number of trials (n)
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Number of successes (x)
Number of successes (x)
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Binomial Probability Formula
Binomial Probability Formula
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binompdf(n, p, x)
binompdf(n, p, x)
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binomcdf(n, p, x)
binomcdf(n, p, x)
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Independent Trials
Independent Trials
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Probability of less than 6
Probability of less than 6
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At least 14 heads in 32 tosses
At least 14 heads in 32 tosses
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Exactly 1 bee sting allergy
Exactly 1 bee sting allergy
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4 or more bee sting allergies
4 or more bee sting allergies
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Exactly 5 financial aid recipients
Exactly 5 financial aid recipients
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Fewer than 3 financial aid recipients
Fewer than 3 financial aid recipients
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Binomial distribution requirement
Binomial distribution requirement
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Binomial distribution parameters
Binomial distribution parameters
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Binomial Distribution - Example 6
Binomial Distribution - Example 6
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Binomial Distribution - Example 7
Binomial Distribution - Example 7
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Independent Trials
Independent Trials
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Binomial Probability Formula
Binomial Probability Formula
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Binomial Probabilities - Table Method
Binomial Probabilities - Table Method
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Binomial probability - Example 8
Binomial probability - Example 8
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Binomial probability - Example 9
Binomial probability - Example 9
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n (binomial)
n (binomial)
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x (binomial)
x (binomial)
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p (binomial)
p (binomial)
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q (binomial)
q (binomial)
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Probability of at least 1 Group O blood type
Probability of at least 1 Group O blood type
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Binomial probability (exactly k successes)
Binomial probability (exactly k successes)
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Calculating P(X < k)
Calculating P(X < k)
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P(X ≥ k)
P(X ≥ k)
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Binomial probability (specific value)
Binomial probability (specific value)
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Brand Recognition Rate
Brand Recognition Rate
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Probability of at least 3 McDonald's fans
Probability of at least 3 McDonald's fans
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Probability of exactly 5 financial aids.
Probability of exactly 5 financial aids.
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Probability of fewer than 3 financial aids.
Probability of fewer than 3 financial aids.
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Study Notes
Binomial Probability Distributions
- Binomial probability distributions deal with circumstances where outcomes fall into two categories (e.g., pass/fail, success/failure).
- A binomial distribution results from a procedure with these characteristics:
- A fixed number of trials.
- Independent trials (one outcome doesn't affect others). A sample less than 5% of the population can be treated as independent.
- Each trial has two outcomes (success or failure).
- The probability of success remains constant for each trial.
Notation
- S and F represent success and failure, respectively.
- p represents the probability of success.
- q represents the probability of failure (q = 1 - p).
- n represents the fixed number of trials.
- x represents a specific number of successes in n trials (0 ≤ x ≤ n).
- P(x) represents the probability of getting exactly x successes in n trials.
Formula for Calculating Probability
-
P(x) = n! / ((n-x)! * x!) * px * q(n-x)
- n! = n factorial
- p = probability of success
- q = probability of failure (q = 1 - p)
Calculating Probability Using a Calculator
-
Use the binompdf function on a graphing calculator to calculate a specific probability of exactly x successes in n trials.
-
Use the binomcdf function to calculate the cumulative probability of x or fewer successes.
-
For finding the probability of at least x successes, subtract the probability of less than x successes from 1.
Important Considerations
- Be sure x and p represent the same category of success.
- When dealing with no replacement, consider events to be independent if n < 0.05N (where N is the population size) .
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