Semester Exam Review 24-25 Part 1

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables, with one variable plotted along the x-axis and the other along the y-axis.

Front

What does it mean if a scatterplot shows a negative correlation?

Back

A negative correlation means that as one variable increases, the other variable tends to decrease.

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction. For example, |–5| = 5.

Front

How do you solve the equation 5b - 6 = 24?

Back

Add 6 to both sides to get 5b = 30, then divide both sides by 5 to find b = 6.

Front

What is a normal distribution?

Back

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

Front

What does it mean for data to be skewed left?

Back

Data is skewed left when the left tail (lower values) is longer or fatter than the right tail, indicating that there are a few low outliers.

Front

What is the formula for evaluating an expression?

Back

To evaluate an expression, substitute the values of the variables into the expression and perform the arithmetic operations according to the order of operations.

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

What is a positive correlation?

Back

A positive correlation means that as one variable increases, the other variable also tends to increase.

Front

What is the median of a data set?

Back

The median is the middle value of a data set when the numbers are arranged in order. If there is an even number of observations, the median is the average of the two middle numbers.