Mean Grouped Data

For this grouped data, what is the mean?

• 20

• 25

• 27

• 30

Find the mean.

• 10

• 20

• 30

• 40

Two sections of a class took the same quiz.  Section A had 15 students who had a mean score of 80, and section B had 20 students who had a mean score of 90.  Overall, what was the approximate mean score for all students on the quiz?

• A. 84.3

• B. 85.0

• C. 85.7

• D. None of these

The class mark of the class 250 - 280 is ______

• 255

• 260

• 265

• 270

Answer explanation

Class mark = (Lower limit + Upper limit)/2 = (250 + 280)/2 = 265

Given the dot plot's shape, what measure of center should be used?

• Mean

• Median

• Standard Deviation

• IQR

Find the mean of the given data sets.

• 31

• 28

• 23

• 30

Which of the following cannot be added a column to compute the mean for grouped data?

• .The lower boundary of the modal class

• The class mark of class interval

• the products of the frequency and the corresponding class mark .

• the frequency of each class interval

What is the formula in finding the mean of Grouped Data?

• 
• 
• 
• None of them.

What is the formula for Mean of grouped data?

• 
• 
• 

The data presented in the table have a mean value of:

• 172

• 161

• 157

• 184