Sample and Weighted Mean

A survey was taken to find out how many times per year children saw a doctor. The results are shown in the table. What was the mean number of doctor visits per year?

• 3

• 3.25

• 3.5

• 3.75

Tags

CCSS.6.RP.A.3B

Terrance's homework grade was a 72, his project grade was an 80 and his exam grade was an 82. Homework is worth 10% of the final grade, the project was worth 50%, and the exam was worth 40%.

What was Terrance's final grade?

• 80

• 78

• 82

• 76

Tags

CCSS.6.RP.A.3C

James received a grade of 90 in the first semester of American History and an 85 in the second semester, and his midterm exam grade was an 82. In this class, semester grades are each worth 40% of the course grade, and each exam is worth 10%.

What grade does he need on the final exam to receive an overall course grade of an 88 in American History?

• 98

• 78

• 100

• He can't reach this grade

Tags

CCSS.7.EE.B.4A

What is the formula to find a weighted mean?

• $\frac{\Sigma\left(xw\right)}{\Sigma w}$

• $\frac{\Sigma\left(xw\right)}{\Sigma x}$

• $\frac{\Sigma\left(xw\right)}{n}$

• $\frac{\Sigma\left(xw\right)}{\Sigma\left(xn\right)}$

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

CCSS.HSS.MD.B.5

In a large survey of cat owners, 82,603 had one cat, 11,894 had two cats, 2,349 had three cats, and 421 had four cats. Approximate the mean number of cats owned by people in this survey.

• 1.2

• 1.0

• 1.5

• 1.8

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

What is the mean of these numbers?
4,5,5,2,3,3,2,8

• 40
• 24
• 4
• 256

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

Find the mean:
28, 18, 19, 18, 17

• 20
• 18
• 11
• 19

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

CCSS.6.SP.A.2

What is another word for AVERAGE?

• Mode

• Median

• Mean

• Not nice

Tags

CCSS.6.SP.A.3

Calculate the mean.

2, 9, 10, 6, 8

• 8

• 4

• 7

• 22

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

CCSS.6.SP.A.2

Find the mean of the numbers below:

12, 8, 14, 5, 1, 3, 0, 8, 10, 11

• 7.2

• 8

• 9

• 7.4

Tags

CCSS.7.NS.A.3