Statistics

The sum of the percentages is always:

• 100%

• $360^o$

• 50%

• None of choices

Tags

CCSS.7.RP.A.3

15 students out of 20 succeed in Math quiz. The percentage of students who succeed is:

• 25%

• 0.75

• 75%

• None of choices

Tags

CCSS.7.RP.A.3

CCSS.7.RP.A.2

Among the following characters, the qualitative one is:

• Grades of students in a Math test

• Salaries of employees

• Number of children of each family

• None of choices

Among the following characters, the quantitative one is:

• Grades of students in a Math test

• Salaries of employees

• Number of children of each family

• All choices

200 people are surveyed about their favorite football team. The population of this study is:

• Favorite football team

• 1 people

• 200 people

• Spain, Brazil and Germany

The grades of 5 students are: 4, 6, 6, 8 and 10. The mean grade is:

• 5

• 6.8

• 7.2

• 10

Tags

CCSS.6.NS.B.2

CCSS.6.NS.B.3

CCSS.6.SP.A.3

CCSS.6.SP.B.5

The scores of a student in five tests: 10; 8; 13; x and 9.

Knowing that the average (mean) of these five scores is 12, then x =

• 12

• 14

• 18

• 20

Tags

CCSS.7.EE.A.1

CCSS.7.EE.B.3

CCSS.7.EE.B.4

During a test, the grades of students of a class are given in the following statistical table:

What is the number of students of this class?

200 people are surveyed about their favorite football team. The following table represents the result of this survey.

• a = 35 b = 15 c = 70 d = 20
  $e\ =\ 108^o$ $f\ =\ 72^o$ $g\ =\ 54^o$
  

• a = 70 b = 20 c = 35 d = 15
  $e\ =\ 54^o$ $f\ =\ 72^o$ $g\ =\ 180^o$
  

• a = 20 b = 70 c = 35 d = 15
  $e\ =\ 72^o$ $f\ =\ 180^o$ $g\ =\ 54^o$
  

• a = 70 b = 20 c = 35 d = 15
  $e\ =\ 108^o$ $f\ =\ 72^o$ $g\ =\ 54^o$
  

Tags

CCSS.7.RP.A.3

CCSS.7.RP.A.2

CCSS.7.SP.B.4

CCSS.7.G.B.5

CCSS.7.SP.A.1

CCSS.7.SP.A.2

During a test, the grades of students of a class are given in the following statistical table:

What is the mean grade of this class?

Tags

CCSS.7.SP.B.4