← Maths syllabus

LouisianaMaths

Statistics and Probability

5 dot points across 5 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How do you measure the center and spread of data, and how do outliers affect the mean, median, and range?

Use measures of center (mean, median) and spread (range, interquartile range) to describe and compare data sets, and account for the effect of outliers (LA A1: S-ID.A.2, S-ID.A.3).
A Louisiana LEAP 2025 Algebra I answer on center and spread (LA A1: S-ID.A.2, A.3): mean versus median, range and interquartile range, comparing two data sets, and how outliers shift the mean.
9 min answer →

What does the correlation coefficient measure, and why does correlation not prove causation?

Interpret the correlation coefficient of a linear fit and distinguish correlation from causation (LA A1: S-ID.C.8, S-ID.C.9).
A Louisiana LEAP 2025 Algebra I answer on correlation (LA A1: S-ID.C.8, C.9): the correlation coefficient r and what its sign and size mean, strength of fit, and why correlation does not imply causation.
9 min answer →

How do you represent a data set with a dot plot, histogram, or box plot, and what does each show?

Represent data with dot plots, histograms, and box plots, and read the shape of a distribution from them (LA A1: S-ID.A.1).
A Louisiana LEAP 2025 Algebra I answer on representing data (LA A1: S-ID.A.1): dot plots, histograms, and box plots, the five-number summary behind a box plot, and reading shape, skew, and spread.
9 min answer →

How do you fit a line to a scatter plot and use it to make predictions, interpreting its slope and intercept?

Fit a linear model to a scatter plot and interpret the slope and intercept in context, using the line to predict (LA A1: S-ID.B.6, S-ID.C.7).
A Louisiana LEAP 2025 Algebra I answer on scatter plots and linear models (LA A1: S-ID.B.6, C.7): describing association, fitting a line of best fit, interpreting its slope and intercept, and predicting with it.
10 min answer →

How do you read a two-way frequency table and compute joint, marginal, and conditional relative frequencies?

Summarize categorical data in a two-way frequency table and interpret joint, marginal, and conditional relative frequencies (LA A1: S-ID.B.5).
A Louisiana LEAP 2025 Algebra I answer on two-way frequency tables (LA A1: S-ID.B.5): reading rows and columns, the totals, and computing joint, marginal, and conditional relative frequencies.
9 min answer →