Statistics Refresher

The scores of 8 students were: 75, 78, 73, 89, 82, 87, 93, 95. What was the average score of the students?

• 82

• 83

• 84

• 44

• None of the choices

Tags

CCSS.6.NS.B.3

The mean of 7 numbers is 63. What is the sum of the numbers?

• 9

• 44.1

• 0.9

• 441

• None of the choices

Tags

CCSS.6.SP.B.5C

Out of 100 numbers, sixteen were 5's, twenty-one were 6's, thirty were 7's, and the rest were 8's. Find the arithmetic mean of the numbers.

• 6.5

• 6.8

• 7

• 7.1

• None of the choices

Tags

CCSS.6.SP.B.5C

Thirty students in a class averaged 80% on a certain exam. Twenty others averaged 90%. What is the class average?

• 84

• 85

• 86

• 87

• None of the choices

Tags

CCSS.6.RP.A.3C

If the average annual income of 15 workers is P66,000.00 and six of the workers make P30,000.00 for the year, what is the average annual income of the remaining 9 workers?

• 66,000

• 50,000

• 30,000

• 90,000

• None of the choices

Tags

CCSS.6.SP.B.5C

Anna has an average of 87% on 5 exams in Statistics. What must she get in the sixth exam to average 88% on the six exams?

(a)  

The average of 15 numbers is 7. Angelo is adding these numbers and mistakenly reads 6 of the numbers as 9 instead of 7. What average will he get?

(a)  

Tags

CCSS.6.SP.B.5C

Find the range of the set of numbers: 7, 3, 9, 8, 1, 17.

(a)  

Tags

CCSS.7.NS.A.1C

Given S = {2, 5 , 9, 7, 8, 8}, consider the following statistics:

I. The mean score is 6.5

II. The median is 4

III. The mode is 8

Which of the following is true?

• I only

• I and II only

• I and III only

• II and III only

• None of the choices

Tags

CCSS.6.SP.B.5C

For questions 10 to 12, refer to your handouts

How many are not taking any of the subjects?

(a)