Stats Exam

Front

What is the probability of x < 13 if the mean is 10 and variance is 4?

Back

0.9332

Front

What does a segmented bar graph represent?

Back

A segmented bar graph visually represents the proportion of different categories within a whole, such as the number of lollipops sold in different flavors.

Front

What does a linear regression analysis predict?

Back

It predicts the relationship between two variables, showing how one variable changes in relation to another.

Front

What is a response variable (RV)?

Back

The response variable is the outcome or the variable that is being measured in an experiment, such as the number of items bought.

Front

What does a weak positive trend indicate?

Back

A weak positive trend indicates that as one variable increases, the other variable tends to increase slightly, but the relationship is not strong.

Front

What is the mean in statistics?

Back

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

Front

What is variance in statistics?

Back

Variance measures how far a set of numbers is spread out from their average value.

Front

How do you interpret a linear regression coefficient?

Back

A linear regression coefficient indicates the expected change in the response variable for a one-unit increase in the predictor variable.

Front

What is the purpose of a bar graph?

Back

A bar graph is used to compare different categories of data visually.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation indicates that one variable directly affects the other.