HM4 Unit 5 Review

Front

What is the probability of getting at least 13 heads when flipping a coin 20 times?

Back

.1316

Front

How do you calculate the expected value in a probability scenario?

Back

Expected value is calculated by multiplying each possible outcome by its probability and summing all these products.

Front

What is the mean and standard deviation of the SAT scores?

Back

Mean: 520, Standard Deviation: 110

Front

What percentage of students score higher than 700 on the SAT?

Back

.051

Front

How do you find the expected value of a spinner?

Back

Multiply each outcome by its probability and sum the results.

Front

What is the expected value of the spinner if the outcomes are 1, 2, 3, 4, 5, 6?

Back

4.75

Front

What is a z-score?

Back

A z-score indicates how many standard deviations an element is from the mean.

Front

If a test score has a mean of 80 and a standard deviation of 8, what is the score corresponding to a z-score of 2.2?

Back

98

Front

What is the formula for calculating the expected value of a discrete random variable?

Back

E(X) = Σ [x * P(x)], where x is the outcome and P(x) is the probability of x.

Front

What does a standard deviation measure in a data set?

Back

Standard deviation measures the amount of variation or dispersion of a set of values.