Problem-Solving and Data Analysis · Matemáticas
Probability and conditional probability en el SAT
Probability asks for the chance of an outcome from a table or a description, and the conditional version narrows the question to one group.
- Sección
- Matemáticas del SAT
- Dominio de contenido
- Problem-Solving and Data Analysis
- Peso en la sección
- 15%
- Preguntas que cuentan
- Unas 6 por examen
De las preguntas que cuentan en esa sección
De 40 preguntas que cuentan en la sección
Cómo son las preguntas
A two-way table with a question such as the probability that a student who studies music also plays a sport, or a described random selection.
El error que cuesta puntos
Dividing by the grand total when the question is conditional. A conditional probability divides by the group named in the given clause, not by everyone in the table.
Cómo resolverlas
Underline the given first. That group's total becomes the denominator, and the count you want becomes the numerator. Without a given clause, the denominator is the grand total.
Practica Probability and conditional probability ahora
Diez preguntas sobre esta destreza, sin cronómetro y con la explicación después de cada respuesta. No hace falta cuenta; si inicias sesión, la misma práctica también alimenta la precisión por destreza que lee tu plan de estudio.
Preguntas sobre Probability and conditional probability
- How do you read a two-way table for conditional probability?
- The row or column named by the given clause supplies both numbers. Read across that row for the count you want, and use the row's total as the denominator.
- What does independent mean in a probability question?
- That one outcome does not change the chance of the other, so the joint probability is the product of the two. In a table, independence shows up as matching conditional probabilities across groups.
- How many Probability and conditional probability questions are on the SAT?
- College Board does not publish a count per question type, only per content domain. Problem-Solving and Data Analysis makes up about 15 percent of the Math section, which is roughly 6 of the 40 scored Math questions on a full form. Questions on this skill come out of that share.
Más destrezas de Problem-Solving and Data Analysis
- Ratios, rates, proportional relationships, and unitsThis skill is proportional reasoning and unit conversion: building a ratio from a description and converting between units without losing track of them.
- PercentagesPercentages asks for percent change, a percent of a quantity, or the original value after a change.
- One-variable data: Distributions and measures of center and spreadOne-variable data asks you to read a distribution: mean, median, range, standard deviation, and how one added value shifts each of them.
- Two-variable data: Models and scatterplotsTwo-variable data asks you to read a line of best fit: what its slope means, how a prediction uses it, and how far the points sit from it.