Measure of central tendency

Find x if 5, 9, 11, 12, 13, 14, 17 and x have a mean of 12.

• 15
• 16
• 17
• 18

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

Towards the end of season, a netballer had played 14 matches and had an average of 16.5 goals per game. In the final two matches of the season she threw 21 goals and 24 goals. Find the netballer’s new average.

• 18.46
• 11.37
• 19.01
• 17.25

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.SSE.A.1

CCSS.HSS.ID.A.2

A sample of 10 measurements has a mean of 15.7 and a sample of 20 measurements has a mean of 14.3. Find the mean of all 30 measurements.

• 16.3
• 14.8
• 17.1
• 21.4

Tags

CCSS.6.SP.B.5C

A basketball team scored
43, 55, 41 and 37
points in their first four matches.
Determine the mean number of points scored for the first four matches and hence calculate What score will the team need to shoot in the next match so that they maintain the same mean score?

• 52
• 44
• 35
• 27

Tags

CCSS.6.SP.B.5C

The mean of four numbers is 71.5. If three of the numbers are 58, 76, and 88, what is the value of the fourth number?

• 64
• 55
• 48
• 60

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1

The front row in a movie theatre has 23 seats. If you were asked to sit in the seat that occupied the median position, in which seat would you have to sit?

• 17
• 11
• 15
• 12

Tags

CCSS.HSS.ID.A.2

The mean of eight numbers is 41. The mean of two of the numbers is 29 What is the mean of the other six numbers? 

• 34
• 55
• 45
• 72

Tags

CCSS.6.SP.B.5C

Consider Sara’s scores on math quizzes this term: 80, 80, 88, 90, 93.
Find the score needed on the next quiz to bring her average up to 88.

• 78
• 88
• 90
• 97

Tags

CCSS.6.EE.B.7

From January to September, the mean number of car accidents per month was 630. From October to December, the mean was 810 accidents per month. What was the mean number of car accidents per month for the whole year?

• 700
• 675
• 760
• 812

Tags

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1

• Bangkok
• Tokyo
• Paris
• Seattle