ISAT Grade 11 Statistics and Probability Practice

What the test measures

Statistics and Probability skills

Understand and evaluate random processes underlying statistical experiments
Make inferences and justify conclusions from sample surveys, experiments, and observational studies
Use the rules of probability to compute probabilities of compound events in a uniform probability model

Standards basis

Idaho Content Standards (Mathematics) — Idaho

How the ISAT reports it

Idaho ISAT is a state assessment administered to grades 3–8 and 11 and reported against Idaho grade-level content standards rather than a separate national testing framework. The public ISAT page points to summative blueprints and math specifications, while the Idaho Content Standards page shows the math program is organized by grade-band/domain progressions aligned to Idaho standards.

Blueprint & weighting

The public Idaho ISAT page references summative blueprints and item specifications, but the accessible official page content did not expose a published domain-by-domain percentage blueprint for math.

Official sources

Idaho Department of Education — Idaho Standards Achievement Test (ISAT)
Idaho Department of Education — Idaho Content Standards

Practice by skill

Topics mapped to this domain

Try it now

8 free questions · 0/0 correct

Practice playeasy

An art project has $7$ colors, and $4$ will be chosen for the poster. What is $C(7, 4)\textsf{?}$

$C(7,4) = \dfrac{7!}{4! \cdot 3!} = \dfrac{5040}{24 \cdot 6} = 35\textsf{.}$

Practice playeasy

A bakery has $8$ desserts, and $4$ will be tasted in order. What is $P(8, 4)\textsf{?}$

$P(8,4) = \dfrac{8!}{4!} = \dfrac{40320}{24} = 1680\textsf{.}$

Practice playeasy

What is $7!\textsf{?}$

$7! = 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 = 5040\textsf{.}$

Practice playmedium

An online store's weekly visitors are modeled by $v(w)=1{,}250(1.08)^w$ , where $w$ is the number of weeks after a launch campaign begins. According to the model, how many visitors does the store have $2$ weeks after the campaign begins?

Substitute $w=2$ : $v(2)=1{,}250(1.08)^2=1{,}250(1.1664)=1{,}458$ .

Practice playmedium

A bag contains $6$ red marbles and $4$ white marbles. Two marbles are drawn one at a time without replacement. The first marble drawn is red. What is the probability that the second marble is white?

After one red marble is removed, $4$ white marbles remain out of $9$ marbles in the bag. So $P(\text{second white} \mid \text{first red}) = \dfrac{4}{9}\textsf{.}$