Unit 3 Review Alg. 1 IM

Front

What is a residual in statistics?

Back

A residual is the difference between the observed value and the predicted value in a regression analysis.

Front

How do you interpret a residual plot?

Back

A residual plot shows the residuals on the vertical axis and the independent variable on the horizontal axis. It helps to assess the fit of a regression model.

Front

What does a negative residual indicate?

Back

A negative residual indicates that the observed value is less than the predicted value.

Front

What is the formula for probability?

Back

Probability = (Number of favorable outcomes) / (Total number of outcomes).

Front

How do you simplify a fraction?

Back

To simplify a fraction, divide the numerator and the denominator by their greatest common divisor (GCD).

Front

What is a joint relative frequency?

Back

Joint relative frequency is the ratio of the frequency of a specific combination of categories to the total number of observations.

Front

How do you calculate the probability of independent events?

Back

For independent events, the probability of both events occurring is the product of their individual probabilities.

Front

What does a strong positive correlation mean?

Back

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

Front

What is the range of a correlation coefficient?

Back

The range of a correlation coefficient is from -1 to 1, where -1 indicates a perfect negative correlation, 0 indicates no correlation, and 1 indicates a perfect positive correlation.

Front

What is the significance of a correlation coefficient of 0.84?

Back

A correlation coefficient of 0.84 indicates a strong positive relationship between the two variables being analyzed.