updated Jan 24th 2025 random sampling coursew

What is the result of finding 40% of 406?

• 160

• 162.4

• 164

• 166

Tags

CCSS.6.RP.A.3C

During a school assembly, 15 out of 60 students wore red shirts to show school spirit.

What percentage % of students did NOT wear red shirts?

Ans:​ (a)   of student did NOT wear red shirts

focus on the wording of the question

• 75%
• 45%
• 15%

Tags

CCSS.5.NF.B.3

A survey says that 13 out of 20 people have pets.

That means ​ (a)   % of people have pets. I chose ​ (b)   because it is the number out of ​ (c)   .

• 65
• 100
• 52
• 39
• 60

Mrs. Hamilton tallies her students’ test grades in the table. What percent of the class received an A or a B?

Mathematical Equivalence

ON

Of the 350 students at Newman Middle School, 80% will attend the field trip. How many will attend the field trip? (a)  

• 280
• 80
• 70
• 190
• 270

Tags

CCSS.6.RP.A.3C

What is 60% of 20.

Mathematical Equivalence

ON

Tags

CCSS.6.RP.A.3C

1. For a class assignment, Tyler will conduct a survey to find out what students like to do after school. He asks the first 10 people he sees in the gymnasium before school what they like to do after school. Is this data that will be representative of the population?

• Tyler’s sample is not representative because he only asks students in the gym and only 10 students.

• Tyler’s sample is representative because he asks students.

• Tyler’s sample is representative because he asks each person the same question.

Four candidates are running for school president. A random sample of students at the school are surveyed about which of the candidates they are likely to choose. The chart above shows the number of students from the random sample who chose each candidate.

A total of 800 students are expected to vote in the election for school president. Based on the information shown in the chart, How many votes is Deb expected to receive?

• 160

• 320

• 192

• 128

Josie threw a handful of identically shaped buttons into the air, then collected the 27 buttons that landed in a target on the floor.  Is this a random sample of the buttons?

• yes
• no

A middle school surveyed random students to find out which elective the students want to take next year. The results are shown here. How many total students were surveyed?

• 20

• 40

• 14

• 6