Jeff asked his friends about their favorite color. T he table shows the number of friends who chose each color. Based on the information in the table, which inference about the favorite colors appears to be valid ?

They are less likely to select “Yellow” than “Purple” or “Red”

They are more likely to select “Purple” than “Red” or “Orange” combined

They are certain to select “Yellow”

They are less likely to select “Blue” or “Red” than “Orange”

Raina conducted a random survey at the beach to determine 22 teenagers' favorite sport. The results are show in the bar graph. She asked both girls and boys, as indicated in orange and blue. Based on the information in the graph, which inference about the general population of teenagers is invalid (NOT true) ?

Twice as many girls like Football as Hockey.

More girls like Football than boys like hockey and other combined.

More teens like Rugby than Hockey.

Twice as many girls as boys like Football.

A random sample of 50 classmates from Kansas are surveyed. Each student is asked what state from the list they would most like to visit. The table shows the responses. Select the TWO statements about the answers that are valid based on the survey results.

In a group of 200, 28 students would want to go to Georgia

Of those surveyed, 14% want to go to Georgia

In a group of 25, it is expected that 4 people would want to go to California.

Twice as many people want to go to Texas than California

Aaliyah wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

thirty randomly selected students at school

thirty students who are often tardy

thirty students who are rarely tardy

Kasey wants to know how many students there are on average at the schools in her county. She randomly calls 25 schools in her county and finds out how many students they have. She adds the number of students together and divides by 25. Her conclusion is there are an average of 1,200 students in each school. Kasey's conclusion is....

Valid. She used a representative sample.

Invalid. Her sample size is too small.

Invalid. Her sample size is too large.

Bias. She wants schools to enroll more students.

A student wants to know which type of pizza the students at his high school prefer. Which option would give a unbiased, representative sample:

Asking 10 random students from each homeroom.

Asking all the students in the hot lunch line.

Asking every other student who gets off a school bus.

There are three people in Jack's class of 30 who have hamsters. He infers that 10% of people in the U.S. have hamsters. What is wrong with Jack's conclusion?

Jack used a convenience sample, so it is not an accurate representation of the population.

Nothing is wrong with Jack's conclusion. 3/30 = 0.10, which is 10%

Jack should have only looked at a percentage of the males in her class with hamsters.

Jack's sample was too small; he should have counted all the people who have hamsters in the entire school.

Unit 3 Part B Mastery Review

Authored by Brittany Harper

Mathematics

7th Grade

CCSS covered

Used 16+ times

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25 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which scale factor has been applied to the smaller triangle (first triangle) to produce the larger triangle (second triangle)?

Scale Factor: 2

Scale Factor: 1/2

Scale Factor: 8

Scale Factor: 3

Tags

CCSS.7.G.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a scale factor of 2 is applied to Figure A (top triangle), which of these would be a corresponding side length on the new triangle (bottom triangle)?

Tags

CCSS.7.G.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Triangle ABC is similar to triangle FGH.
Which proportion can be used to solve for x?

Tags

CCSS.HSG.SRT.A.2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the length of the actual pool?

4.75 feet

28 feet

65 feet

76 feet

Tags

CCSS.7.G.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A rectangle is shown. If the rectangle is scaled by 4.5, what is the perimeter of the new rectangle?

28 units

54 units

108 units

546.75 units

Tags

CCSS.7.G.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement is true regarding the slope of AC and CE?

The slope of AC is LESS THAN the slope of CE because the ratio of the change in y-values of the endpoints to the change in x-values of the endpoints is LESS for AC than for CE.

The slope of AC is GREATER THAN the slope of CE because the ratio of the change in y-values of the endpoints to the change in x-values of the endpoints is GREATER for AC than for CE.

The slope of AC is EQUAL THAN the slope of CE because the ratio of the change in y-values of the endpoints to the change in x-values of the endpoints is EQUAL for AC than for CE.

The relationship between the slope of AC and the slope of CE cannot be determined because the triangles are congruent.

Tags

CCSS.8.EE.B.6

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Triangle ABC is similar to triangle DEF. Which statement is true concerning the slope of the line formed by the hypotenuse of each triangle?

The slope of both triangles equals -1

The slope of both triangles equals 1

The slope of both triangles equals 2/3

The slope of both triangles equals 3/2

Tags

CCSS.8.EE.B.6

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Unit 3 Part B Mastery Review

Which scale factor has been applied to the smaller triangle (first triangle) to produce the larger triangle (second triangle)?

If a scale factor of 2 is applied to Figure A (top triangle), which of these would be a corresponding side length on the new triangle (bottom triangle)?

Triangle ABC is similar to triangle FGH.
Which proportion can be used to solve for x?

What is the length of the actual pool?

A rectangle is shown. If the rectangle is scaled by 4.5, what is the perimeter of the new rectangle?

Which statement is true regarding the slope of AC and CE?

Triangle ABC is similar to triangle DEF. Which statement is true concerning the slope of the line formed by the hypotenuse of each triangle?

Which of the following shows an UNDEFINED SLOPE?

Sara works 40 hours per week and earns $660. Which graph shows the unit rate for this situation?

Using the similar triangles, which equation could be used to find the slope of the ORANGE LINE?

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Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Unit 3 Part B Mastery Review

Which scale factor has been applied to the smaller triangle (first triangle) to produce the larger triangle (second triangle)?

If a scale factor of 2 is applied to Figure A (top triangle), which of these would be a corresponding side length on the new triangle (bottom triangle)?

Triangle ABC is similar to triangle FGH. Which proportion can be used to solve for x?

What is the length of the actual pool?

A rectangle is shown. If the rectangle is scaled by 4.5, what is the perimeter of the new rectangle?

Which statement is true regarding the slope of AC and CE?

Triangle ABC is similar to triangle DEF. Which statement is true concerning the slope of the line formed by the hypotenuse of each triangle?

Which of the following shows an UNDEFINED SLOPE?

Sara works 40 hours per week and earns $660. Which graph shows the unit rate for this situation?

Using the similar triangles, which equation could be used to find the slope of the ORANGE LINE?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Triangle ABC is similar to triangle FGH.
Which proportion can be used to solve for x?