Data Analysis Midterm

Front

What is the mean of a set of numbers?

Back

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

Front

How do you find the mean of these numbers: 2, 57, 38, 42, 6?

Back

Mean = (2 + 57 + 38 + 42 + 6) / 5 = 29.

Front

What is a ratio?

Back

A ratio is a relationship between two numbers indicating how many times the first number contains the second.

Front

If there are 80 students in Mr. Bass’ classes with a boys to girls ratio of 2:3, how many boys are there?

Back

Boys: 32, Girls: 48.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Front

What is the simplest form of the ratio 28:16?

Back

7:4.

Front

What is the median of a set of numbers?

Back

The median is the middle value in a list of numbers sorted in ascending order.

Front

Find the median of these numbers: 4, 2, 7, 4, 3.

Back

Median = 4 (when sorted: 2, 3, 4, 4, 7).

Front

What is the mode of a set of numbers?

Back

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

Front

What is the range of a set of numbers?

Back

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