AP Stats Semester 1 Review Warm Up #1

Front

What is the equation of the Least Squares Regression Line (LSRL)?

Back

The LSRL is a linear equation that best fits a set of data points in a scatterplot, minimizing the sum of the squares of the vertical distances (residuals) from the points to the line.

Tags

CCSS.HSS.ID.C.8

Front

What is a residual in statistics?

Back

A residual is the difference between the observed value and the predicted value given by a regression model. It indicates how far off a prediction is from the actual data.

Tags

CCSS.HSS.ID.B.6B

Front

What does standard deviation measure in a data set?

Back

Standard deviation measures the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean, while a high standard deviation indicates that the values are spread out over a wider range.

Front

What is the 87th percentile in a normal distribution?

Back

The 87th percentile is the value below which 87% of the data falls. In a normal distribution, it can be found using the mean and standard deviation.

Tags

CCSS.HSS.ID.A.4

Front

What is the purpose of an experimental design?

Back

An experimental design is a plan for a controlled experiment that aims to test a hypothesis by manipulating one or more variables while keeping others constant.

Tags

CCSS.HSS.IC.B.3

Front

What does it mean for a variable to be confounded with another variable?

Back

Confounding occurs when the effects of two or more variables are mixed together, making it difficult to determine the individual effect of each variable.

Tags

CCSS.HSS.IC.B.3

Front

How do you calculate the mean of a data set?

Back

The mean is calculated by adding all the values in the data set and dividing by the number of values.

Tags

CCSS.6.SP.B.5C

Front

What is the significance of the mean in a data set?

Back

The mean provides a measure of central tendency, representing the average value of the data set.

Tags

CCSS.6.SP.A.3

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them by plotting points on a Cartesian plane.

Tags

CCSS.8.SP.A.1

Front

What is the difference between a sample and a population?

Back

A sample is a subset of a population, used to make inferences about the entire population.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1