Day 5 Probability and Statistics

A bag contains 9 red marbles, 3 blue marbles, 3 green marbles, and 3 yellow marbles. Determine whether the statement correctly describes the likelihood of an event. Select True or False for each statement.

​ The probability that a yellow marble is selected is 0.
(a)  

• False
• True

Tags

CCSS.7.SP.C.5

A bag contains 9 red marbles, 3 blue marbles, 3 green marbles, and 3 yellow marbles.

What is the probability that a red marble is selected from the bag? (Write answer as a fraction)

Mathematical Equivalence

ON

Tags

CCSS.7.SP.C.7B

A bag contains 9 red marbles, 3 blue marbles, 3 green marbles, and 3 yellow marbles.

Are the probabilities of selecting a blue marble, a green marble, or a yellow marble from the bag equal?

• True

• False

Tags

CCSS.7.SP.C.7B

Thomas wants to estimate the number of students in his seventh grade class who are interested in starting a computer club. He needs to create a random sample of students.

How should Thomas collect his sample data?

• Thomas should ask 30 students in his technology class.

• Thomas should ask 30 students who are his closest friends.

• Thomas should ask 30 students in the seventh grade.

• Thomas should ask 30 students from the entire school.

Tags

CCSS.HSS.IC.B.3

A radio station is giving away t-shirts. In the box of t-shirts there are

5 small shirts, 12 medium shirts, 24 large shirts, and 9 XL (extra-large) shirts.

Each person reaches in and randomly pulls out a t-shirt.

Determine which of the statement correctly describes the likelihood of an event based on the box of t-shirts. Select all the statements that are true.

• Jen wears a small . It is unlikely she will get her shirt size.

• Dave can wear a medium or large shirt . It is likely he will get a shirt that fits him.

• The radio station gave away all the shirts in the box . About half the people who received a shirt ended up with a medium .

Tags

CCSS.7.SP.C.5

The middle school administrators are deciding whether to buy new lighting for the auditorium or a new scoreboard for the basketball court.

Which sampling method will give the administrators the most accurate

idea as to what most students want to be purchased?

• Ask a random sample of the students in the school's drama club.

• Ask the seventh-grade students in the math club.

• Ask the students on the school's basketball team.

• Ask every tenth student in the student directory.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A representative sample of 50 seventh-grade students is surveyed. Each student is asked what flavor ice cream he or she prefers.

The table shows the responses.

What percentage of the surveyed seventh-grade students prefer chocolate ice cream?

Mathematical Equivalence

ON

Tags

CCSS.7.SP.A.2

A representative sample of 50 seventh-grade students is surveyed. Each student is asked what flavor ice cream he or she prefers. The table shows the responses.

If there are 200 seventh-grade students, how many would you expect to prefer vanilla ice cream based on the survey?

• 40

• 50

• 60

• 25

Tags

CCSS.7.SP.A.2

A representative sample of 50 seventh-grade students is surveyed. Each student is asked what flavor ice cream he or she prefers.

The table shows the responses.

Select all of the statements that are valid based on the results.

• Of the seventh-grade students surveyed, 25% prefer chocolate.

• In a group of 200 seventh-grade students, it is expected that 100 would prefer chocolate.

• There are 2.5 times as many seventh-grade students who prefer chocolate as prefer vanilla.

• In a group of seventh-grade students where 20 prefer mint, it is expected that 21 would prefer strawberry.

Tags

CCSS.7.SP.A.2

• Red 20,

  Yellow 48,

  Blue 11,

  Orange 21

• Red 25,

  Yellow 7,

  Blue 49,

  Orange 19

• Red 16,

  Yellow 49,

  Blue 30,

  Orange 5

• Red 45,

  Yellow 28,

  Blue 22,

  Orange 5

Tags

CCSS.7.SP.C.8C