Statistics Review

Tuscaloosa County Schools randomly selected a sample of 70 teachers to find out what technology its teachers like best. What is the population?

• 70 Teachers

• All Tuscaloosa County Teachers

• Students

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Manny wants to know how many students at HMS enjoy solving math problems. What is the best sampling method?

• ask for 20 volunteers to discuss whether they enjoy solving math problems

• ask the first 20 people to enter the gym in the morning

• Randomly ask 2 of his friends in the hallway

• Ask every 10th student that walks into lunch

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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

Tags

CCSS.7.RP.A.3

3 out of 14 people in a random sample say they're voting for Joe for class president. If 868 people vote, how many can we expect to vote for Joe?

• 162

• 3

• 186

• 483

Tags

CCSS.7.RP.A.3

What do you do if there are two numbers tied in the middle when you are finding the median?

• Add them together.

• Add the two numbers in the middle & then divide by two.

• They are both the median

• Put a .5 on the end of the first number.

Tags

CCSS.6.SP.B.5C

How do you find the range?

• Add. Count. Divide.

• biggest - smallest

• the middle number

• biggest + smallest

Tags

CCSS.4.MD.B.4

What is the mean?

4, 5, 6, 7, 3, 4, 10, 1

• 7

• 4.5

• 5

• 40

Tags

CCSS.6.SP.B.5C

Find the median of these numbers:
2, 3, 4, 5, 5, 7

• 4
• 5
• 4.5
• 6

Tags

CCSS.6.SP.B.5C

Find the median, mean and range:  3, 5, 7, 9, 14, 8, 3

• median = 7  

  mean = 7

  range = 11

• median = 9

  mean = 7

  range = 0

• median = 7

  mean = 49

  range = 11

Tags

CCSS.6.SP.B.5C

Find the interquartile range of the number list:

2, 6, 2, 0, 8, 1, 5

(a)  

Tags

CCSS.6.SP.B.5C