ACAP Grade 8 Statistics and Probability. Practice it free.

Investigates bivariate data and association patterns in scatter plots. This Grade 8 reporting domain maps to 2 practice skills and 8 representative questions from the playable bank.

Grade 82 mapped skills
What the test measures

Statistics and Probability skills

  1. Investigate patterns of association in bivariate data

  2. Construct and interpret scatter plots

  3. Use lines of best fit to make predictions

Standards basis

Alabama Course of Study: Mathematics — Alabama

How the ACAP reports it

Alabama’s ACAP Summative is a state assessment tied to Alabama’s own K-12 mathematics standards and reporting structure rather than a national consortium blueprint. The publicly accessible assessment page does not expose a separate ACAP math blueprint in the fetched content, so the safest official coverage basis is Alabama’s mathematics standards organization into grade-level domains.

Blueprint & weighting

ACAP uses the Independent / state-specific framework (by grade domains structure).

Try it now

8 free questions · 0/0 correct

Practice playeasy

A trend line for the number of car washes a club holds xx and the club's funds yy in dollars is y=75x+120y = 75x + 120. According to the line, how many dollars did the club have before holding any car washes?

At x=0x = 0, y=120y = 120 dollars: the yy-intercept is the starting amount.

Practice playeasy

A two-way table has rows Dog/Cat and columns Boys/Girls: Dog&Boys=10, Dog&Girls=6, Cat&Boys=5, Cat&Girls=9. How many chose Dog in total?

Row total for Dog: 10+6=1610+6=16.

Practice playeasy

A trend line for miles jogged xx and calories burned yy is y=90x+20y = 90x + 20. How many calories does the line predict for a 44-mile jog?

y=90(4)+20=360+20=380y = 90(4) + 20 = 360 + 20 = 380 calories.

Practice playeasy

A two-way table has rows Dog/Cat and columns Boys/Girls: Dog&Boys=10, Dog&Girls=6, Cat&Boys=5, Cat&Girls=9. What fraction of all surveyed were Dog and Boys? Simplify.

1030=13\dfrac{10}{30} = \dfrac{1}{3}.

Practice playeasy

A trend line predicts Mia will spell 1818 words correctly in a spelling bee. She actually spells 2121 words correctly. What is the residual (actual minus predicted)?

Residual =2118=3= 21 - 18 = 3 words.

Practice playeasy

A two-way table has rows Bus/Walk and columns 6th/7th: Bus&6th=12, Bus&7th=8, Walk&6th=4, Walk&7th=16. How many were surveyed in total?

Add all cells: 12+8+4+16=4012+8+4+16=40.

Practice playeasy

A line of best fit for the number of lawns Jaden mows xx and his savings yy in dollars is y=15x+40y = 15x + 40. According to the line, how many dollars did Jaden have saved before mowing any lawns?

At x=0x = 0 lawns, y=40y = 40: the yy-intercept is the starting savings.

Practice playeasy

A two-way table has rows Bus/Walk and columns 6th/7th: Bus&6th=12, Bus&7th=8, Walk&6th=4, Walk&7th=16. How many chose Bus in total?

Row total for Bus: 12+8=2012+8=20.

Keep practicing

Turn statistics and probability into game time.

The ACAP placement starts with this test's real coverage map and finds the right difficulty.