Review for Probability and Statistics test

If there are n questions and each question has m answer choices, the total number of possible outcomes is given by $$m^n$$ .

The mean is calculated by summing all the numbers and dividing by the total count of numbers.

The total combinations are $$10^4 \times 26^2 = 6,760,000$$ .

Percent decrease is calculated using the formula: $$\frac{{\text{original value} - \text{new value}}}{{\text{original value}}} \times 100$$ .

A circle graph, or pie chart, represents data as slices of a circle, showing the proportion of each category relative to the whole.

Permutations consider the order of selection, while combinations do not.

Probability is calculated as the number of favorable outcomes divided by the total number of possible outcomes.

The range is the difference between the maximum and minimum values in the data set.

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

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.