Measures of Dispersion

The two histogram show the distribution of Mathematics and Science for 165 students in a test. Find the percentage of students who obtained more than 50 marks in both tests.

• A

• B

• C

• D

Which of the following box plots is constructed correctly based on ogive?

• 
• 
• 
• 

What is the percentage of residents who aged 54.5 years old and above?

• 30%

• 40%

• 60%

• 70%

• A

• B

• C

• D

Which of the following class interval has a midpoint 145.5?

• 140-149

• 140-150

• 141-149

• 141-150

The class interval X-55 has a midpoint of 52. State the value of X.

• 47

• 48

• 49

• 50

Which of the following is not true?

• Size of the class is 4

• For the class interval 25 - 29, the lower limit is 25

• For the class interval 30 - 34, the upper boundary is 34.5

• For the class interval 35 - 39, the midpoint is 37

Which histogram does not show the correct distribution shape?

• 
• 
• 
• 

Find the value of x.

• 3

• 4

• 5

• 6

Calculate the mean.

• 14.4

• 16.4

• 17

• 18.4