Category focus

Measurement and Data

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Interpret scatterplots, describe associations, calculate variation, and evaluate samples.

Questions

Skill type

measurement and-data

Study mode

Practice + review

Sample questions

Question

The set of scores is 72, 80, 80, 86, 92. What is the median?

A.
80
B.
82
C.
86
D.
88

The values are already in order, and the middle value is 80.

Question

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Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

The scatterplot shows the energy in watts and the light output in lumens per watt of several lightbulbs. y Lightbulbs 80 75 70 65 60 55 50 45 40 0 20 40 60 80 100 120 x Energy (watts) Which statement best describes the association between the energy and light output of these lightbulbs?

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Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

Students recorded the total number of pages and chapters in each of several books on the scatterplot. y Books 280 260 240 220 200 180 160 140 120 100 80 60 40 20 0 123 4 5 6 7 8910 x Total Number of Chapters Based on the scatterplot, which is the best prediction of the total number of pages in a book with 4 chapters?

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Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

The scatterplot shows the time spent playing a video game and the number of points scored by several students. y Video Game 1,350 1,200 1,050 900 750 600 450 300 150 0 510 15 20 25 30 35 40 45 x Time (minutes) Based on the scatterplot, which is the best prediction of the number of points scored by a student who spends 45 minutes playing the video game?

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Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

The scatterplot shows the height in centimeters and weight in kilograms of several students. Student Height and Weight y 64 60 56 52 48 44 40 36 32 28 0 134 138 142 146 150 154 158 x Height (cm) Based on the scatterplot, which is the best prediction of the height in centimeters of a student with a weight of 64 kilograms?

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Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

A math teacher observed that as the number of hours students studied their multiplication facts increased, the number of errors the students made on their multiplication tests decreased. Which scatterplot could support this teacher’s observation? y Multiplication Tests y Multiplication Tests 10 10 8 8 A 6 C 6 4 4 2 2 0 1 2 3 4 5 x 0 1 2 3 4 5 x Study Time (hours) Study Time (hours) y Multiplication Tests y Multiplication Tests 10 10 8 8 B 6 D 6 4 4 2 2 0 1 2 3 4 5 x 0 1 2 3 4 5 x Study Time (hours) Study Time (hours)

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Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

The scatterplot shows the low temperature and high temperature each day for a two-week period of time. Temperatures y 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 0 71 72 73 74 75 76 77 78 79 80 x Low Temperature (°F) Based on the scatterplot, which is the best prediction of the high temperature in degrees Fahrenheit on a day when the low temperature is 71 °F?

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Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

$The scatterplot shows the relationship between the weight in pounds and the age in weeks of a certain dog breed. y Dog Weight 100 90 80 70 60 50 40 30 20 0 10 14 18 22 26 30 34 38 x Age (weeks) Based on the scatterplot, which is the best prediction of the weight in pounds of a dog that is 28 weeks old?$ Open full-size question

F.
$Answer F: 12 lb$
G.
$Answer G: 75 lb$
H.
$Answer H: 45 lb$
J.
$Answer J: 105 lb$

Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

$The scatterplot shows the relationship between the number of nights spent in a hotel and the total cost for the hotel. y Hotel Costs 600 500 400 300 200 100 0 1 2 3 4 5 6 x Number of Nights Which conclusion is best supported by the scatterplot?$ Open full-size question

F.
$Answer F: As the number of nights spent in a hotel increases, the total cost for the hotel increases.$
G.
$Answer G: As the number of nights spent in a hotel increases, the total cost for the hotel decreases.$
H.
$Answer H: As the number of nights spent in a hotel increases, the total cost for the hotel remains the same.$
J.
$Answer J: There is no relationship between the number of nights spent in a hotel and the total cost for the hotel.$

Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

$A teacher bought sets of books at a cost of $17.95 per set. The teacher also paid a one-time shipping fee of $22. Which table shows the relationship between the total cost of the books and the number of sets of books the teacher bought? Cost of Books Cost of Books Sets of Total Cost Sets of Total Cost Books (dollars) Books (dollars) F H 16 369.95 16 682.10 20 457.95 20 753.90 24 545.95 24 825.70 28 633.95 28 897.50 Cost of Books Cost of Books Sets of Total Cost Sets of Total Cost Books (dollars) Books (dollars) G J 16 746.90 16 309.20 20 834.90 20 381.00 24 922.90 24 452.80 28 1,010.90 28 524.60$ Open full-size question

F.
$Answer F: Answer F (see image)$
G.
$Answer G: Answer G (see image)$
H.
$Answer H: Answer H (see image)$
J.
$Answer J: Answer J (see image)$

Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

$The scatterplot shows the relationship between the number of games a baseball team won in a season and the number of hours the team practiced each week during the season. Baseball Games Won vs. Hours of Practice y 20 16 12 8 4 0 1 2 3 4 5 x Hours of Practice per Week Based on the scatterplot, which is the best prediction of the number of games a baseball team won if the team practiced 3 hours each week during the season?$ Open full-size question

F.
$Answer F: 10 games$
G.
$Answer G: 20 games$
H.
$Answer H: 13 games$
J.
$Answer J: 15 games$

Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

$The list shows the weight in pounds of 6 puppies at birth. 3, 1.6, 2.8, 2.5, 1.7, 2.8 What is the mean absolute deviation of these numbers?$ Open full-size question

F.
$Answer F: 0.5$
G.
$Answer G: 2.4$
H.
$Answer H: 1.9$
J.
$Answer J: 14.4$

Imported from a released STAAR assessment item. Review recommended for final answer key alignment.

Question

The list shows the number of visitors to a museum on each of 5 days last week.

95 88 93 86 88

What is the mean absolute deviation of the numbers in the list?

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Released 2026 STAAR Grade 8 Mathematics, question 35. Answer verified against the official key.

Question

The set of scores is 72, 80, 80, 86, 92. What is the median?

A.
80
B.
82
C.
86
D.
88

The values are already in order, and the middle value is 80.