TEST on Unit 2 Probability and Statistics

Front

What is the median in a set of numbers?

Back

The median is the middle value in a list of numbers sorted in ascending order. If there is an even number of observations, the median is the average of the two middle numbers.

Front

How do you find the median of a data set with an even number of values?

Back

Add the two middle numbers together and divide by 2.

Front

What is the definition of central tendency?

Back

Central tendency refers to the measure that represents the center or typical value of a dataset, commonly calculated as mean, median, or mode.

Front

What is the mean?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

What is the mode?

Back

The mode is the value that appears most frequently in a data set.

Front

What is the range of a data set?

Back

The range is the difference between the highest and lowest values in a data set.

Front

How do you calculate the percentage of a number?

Back

To calculate the percentage of a number, multiply the number by the percentage (in decimal form). For example, 23% of $27.31 is calculated as 27.31 * 0.23.

Front

What is a circle graph (pie chart)?

Back

A circle graph, or pie chart, is a circular statistical graphic divided into slices to illustrate numerical proportions.

Front

If 625 people said cheese is their favorite topping and it represents 25% of the survey, how many people were surveyed?

Back

To find the total surveyed, divide 625 by 0.25, which equals 2500 people.

Front

What is the importance of using median in salary data?

Back

The median is often a better measure of central tendency for salary data because it is not affected by extreme values (outliers).