Flashcard: Statistics and Probability

Front

What is the median in a data set?

Back

The median is the middle value when the data set is ordered from least to greatest. If there is an even number of values, the median is the average of the two middle numbers.

Front

How do you calculate the theoretical probability of an event?

Back

The theoretical probability of an event is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

Front

What is a box-and-whisker plot?

Back

A box-and-whisker plot is a graphical representation of a data set that shows its minimum, first quartile, median, third quartile, and maximum.

Front

What does a stem-and-leaf plot represent?

Back

A stem-and-leaf plot is a method of displaying quantitative data in a graphical format, similar to a histogram, that retains the original data values.

Front

What is the difference between experimental and theoretical probability?

Back

Experimental probability is based on the actual results of an experiment, while theoretical probability is based on the expected outcomes in a perfect world.

Front

How do you find the range of a data set?

Back

The range is found by subtracting the smallest value in the data set from the largest value.

Front

What is a quartile in statistics?

Back

A quartile is a type of quantile that divides a data set into four equal parts, with each part representing a quarter of the data.

Front

What does it mean if 75% of students scored 80 or better?

Back

It means that three-quarters of the students scored 80 or higher on the test, indicating a high performance level.

Front

How can you estimate the number of students with a pet based on a survey?

Back

You can use the proportion of surveyed students who have a pet to estimate the total number of students with pets by setting up a ratio.

Front

What is a frequency distribution?

Back

A frequency distribution is a summary of how often each value occurs in a data set.