AK STAR Grades 6-8 Statistics & Probability Practice

Statistics & Probability skills

6.SP.1–6.SP.5

7.SP.1–7.SP.8

8.SP.1–8.SP.4

Standards basis

Alaska Mathematics Standards — Alaska

How the AK STAR reports it

AK STAR is Alaska’s state summative assessment, built around Alaska’s own mathematics standards rather than a national consortium framework. Its math blueprint is organized into grade-level content strands/instructional areas and an adaptive growth component aligned to MAP Growth instructional areas.

Blueprint & weighting

The blueprint gives target item counts and point ranges by grade and strand, rather than fixed percentage weights. Grades 3-5 and 6-9 each include summative item counts plus additional growth items; grade 9 has no summative Geometry strand, with Geometry reported only through growth items.

Official sources

Alaska Department of Education and Early Development
Alaska Department of Education and Early Development
Alaska Department of Education and Early Development

8 free questions · 0/0 correct

Practice playeasy

A shipping clerk weighed $14$ packages. The frequency table shows each weight and how many packages had that weight.
$\begin{array}{c|c} \text{Weight (lb)} & \text{Number of packages} \\ \hline 2 & 3 \\ 7 & 2 \\ 12 & 5 \\ 17 & 2 \\ 22 & 2 \end{array}$

What is the median package weight?

There are $14$ weights. Listing every weight from least to greatest, the $7$ th and $8$ th values are both $12$ , so the median is $12$ pounds.

Practice playeasy

Two fair coins are flipped. How many outcomes are in the sample space?

Each coin has $2$ outcomes, so the sample space has $2 \times 2 = 4$ outcomes: HH, HT, TH, TT.

Practice playeasy

A class answered the statistical question "How many pages did you read this week?" The answers were $12, 15, 15, 18, 20, 15$ . How many students were interviewed?

Each answer in the list is one student. Count every value, including repeats: there are $6$ answers, so $6$ students were interviewed.

Practice playeasy

A student is writing questions about pets. Which of these is a statistical question?

A statistical question anticipates variability: many people or things can give different answers. "How many pets does each family on my street own?" asks about many families, so the numbers can differ. It is a statistical question.

Practice playmedium

Five test scores are $70$ , $78$ , $84$ , $90$ , and $96$ . One score is removed from the data set, but which score was removed is not stated. How does this affect the mean?

The mean of the five given scores can be found, but removing a different score changes the mean in different ways. Without knowing which score was removed, the effect cannot be determined.

Practice playeasy

Seven test scores are $70\textsf{,}$ $75\textsf{,}$ $88\textsf{,}$ $85\textsf{,}$ $90\textsf{,}$ $65\textsf{,}$ and $87\textsf{.}$ What is the mean score?

Mean $= \dfrac{70 + 75 + 88 + 85 + 90 + 65 + 87}{7} = \dfrac{560}{7} = 80$ .

Practice playeasy

Find the range of 10, 3, 15, 6.

Range $= \max - \min = 15 - 3 = 12$ .

Practice playeasy

The distances, in miles, run on seven days are $14\textsf{,}$ $6\textsf{,}$ $20\textsf{,}$ $9\textsf{,}$ $11\textsf{,}$ $18\textsf{,}$ and $6\textsf{.}$ What is the median distance?

In order, the values are $6\textsf{,}$ $6\textsf{,}$ $9\textsf{,}$ $11\textsf{,}$ $14\textsf{,}$ $18\textsf{,}$ $20\textsf{.}$ The median is the middle value, $11\textsf{.}$

AK STAR Grades 6-8 Statistics & Probability. Practice it free.

Statistics & Probability skills

6.SP.1–6.SP.5

7.SP.1–7.SP.8

8.SP.1–8.SP.4

Topics mapped to this domain

Central Measures from Tally Charts (ACT)

Compound probability

Describing a Data Distribution

Identifying Statistical Questions

Mean change from data set edits

Mean from a data list

Measures of center and variability

Median from a data list

One-event probability word problems

Probability basics

Probability from number sets

Probability of simple events

8 free questions · 0/0 correct

Turn statistics & probability into game time.

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