Middle School Statistics

At an assembly 7 out of 10 students who entered the gym were carrying a backpack. Based on this information, if 700 students were at the assembly, how many students could be expected to be carrying a backpack?

• 49

• 490

• 210

• 421

The Student Council asked every tenth student in the lunch line how they preferred to be contacted with school news. The results are shown in the table. Is this an unbiased sample? If yes, suppose there are 684 students at the school. How many can be expected to prefer E-mail?

• No, it's a biased sample

• 432

• 304

• 16

A radio station asks its listeners to dial one of two numbers to indicate their preference for one of two candidates in an upcoming election. Of the responses received, 76% favored candidate A. If there are 1,500 registered voters, how many will vote for candidate A?

• 1,140

• 6

• 1,974

• 100

What is the median of the following data set:
1, 3, 4, 4, 5, 6, 7

• 1

• 4

• 5

• 7

What is the mean of the following set of numbers: 4, 8, 12, 16, 20?

Mathematical Equivalence

ON

Which of the following are statistical questions? Select all that apply.

• How many pages are in that book?

• What is the temperature outside right now?

• What is the average weight of a squirrel?

• What are the favorite cars for junior high students?

• How many seconds are in an hour?

Which of the following are statistical questions?

• yes

• How may text messages does a sixth-grade student send each day?

• no

• How many pizza toppings do students like on their pizza?

• no

• Ho many students are in sixth grade in my school?

• no

• who is the principal of Magnolia Middle school?

• no

• what is the favorite pizza topping of students in my class?

What is a requirement of a statistical question?

• a variety of answers

• one set answer

What is the mode of the following data set:
1, 1, 1, 2, 5, 9

• 1

• 2

• 5

• 9

Which of the following is an example of a statistical question?

• What color shirt are you wearing?

• How many dogs do you have?

• What are the favorite ice cream flavors of CMS 6th graders?

• Is it a nice day outside?