Definitions
Define a trial.
A single attempt or realization of a random phenomenon.
What is the addition rule for probability?
P(A U B) = P(A) + P(B)
The Masterfoods company says that before the introduction of purple, yellow candies made up 20% of their plain M&M's, red another 20%, and orange, blue, and green each made up 10%. The rest were brown. If you pick an M&M at random what is the probability it is brown?
0.3
When did Gustav Fechner die?
1887
What is the symbol for Variance?
Var/lower case sigma squared
What is the standard deviation?
The spread of the model, and is the square root of the variance.
What is the multiplication rule of probability?
P(A and B) = P(A) * P(B)
The Masterfoods company says that before the introduction of purple, yellow candies made up 20% of their plain M&M's, red another 20%, and orange, blue, and green each made up 10%. The rest were brown. If you pick an M&M at random, what is the probability it is not green?
0.9
What book did Gustav Fechner publish in 1860?
Elemente der Psychophysik
What does | mean in statistics?
Given
What is the 10% condition?
If you sample without replacement, trials aren't independent, but you may still proceed as long as the sample is smaller than 10% of the population.
Write the conditional distribution equation.
P(B|A) = P(A and B)/P(A)
The Masterfoods company says that before the introduction of purple, yellow candies made up 20% of their plain M&M's, red another 20%, and orange, blue, and green each made up 10%. The rest were brown. If you pick an M&M at random, what is the probability that it is yellow or orange?
0.3
What did John Venn create?
The Venn diagram
What does U mean in statistics?
Or
What is a binomial probability model?
A binomial model is appropriate for a random variable that counts the number of successes in a fixed number of Bernoulli trials.
What is the probability of event A happening?
P(A) = # outcomes in A divided by the total # of possible outcomes
The Masterfoods company says that before the introduction of purple, yellow candies made up 20% of their plain M&M's, red another 20%, and orange, blue, and green each made up 10%. The rest were brown. If you pick three M&M's in a row, what is the probability that the third one is the first one that's red?
0.128
What book did John Venn write regarding statistics?
What does n mean in statistics?
And
Define independence.
Events A and B are independent when P(B given A) is the Probability of B.
What is the standard deviation equation of random variable X?
Standard deviation(X) = square root of the Variance(X)
The Masterfoods company says that before the introduction of purple, yellow candies made up 20% of their plain M&M's, red another 20%, and orange, blue, and green each made up 10%. The rest were brown. If you pick three M&M's in a row, what is the probability that at least one is green?
0.271
When was John Venn born?
1834
What does upper case sigma mean?
The sum of