Mean, Median, Mode Grouped Data

Mean, Median, Mode Grouped Data

(Unit Test 2 Review)

Multiple Choice

What is Xm and n in the formula of the mean for grouped data?

• frequency of the mean class

• Midpoint and total frequency

• Classmark and frequency

• Midpoint and total cumulative frequency

Multiple Choice

What column do we need in calculating the mean for grouped data?

• Class Interval

• Frequency

• Cumulative Frequency

• Midpoint/Classmark

Fill in the Blank

What is the symbol for midpoint or classmark?

Multiple Choice

After constructing the classmark, what is the next step?

• Add the frequency and the classmark.

• Subtract the frequency and the classmark.

• Multiply the frequency and the classmark then add all of them together.

• Divide the frequency and the classmark then add all of them together.

Fill in the Blank

What is the sum of the product of the frequency and the classmark?

Fill in the Blank

What is n or the total frequency?

Fill in the Blank

What is the mean? Hint: Until 2 decimal places only.

Multiple Choice

What column do we need to find the median class?

• Frequency

• Relative frequency

• Cumulative Frequency

• Succesive frequency

Open Ended

How do we find the cumulative frequency?

Multiple Choice

To find the median class, we need to:

• Add n by 2

• Subtract n by 2

• Multiply n by 2

• Divide n by 2.

Multiple Choice

After dividing n by 2 (n/2), the median class is the

• class interval equal to n/2

• class interval less than n/2

• class interval equal or greater than n/2.

• class interval greater than n.

Fill in the Blank

Once you have the median class, substitute the values in the formula. What is the lower boundary of the median class?

Fill in the Blank

What is n/2?

Fill in the Blank

What is the median class? Hint: Class interval that is equal or greater than n/2

Fill in the Blank

What is the value of less than cumulative frequency?

Fill in the Blank

What is the frequency of the median class or fm?

Fill in the Blank

What is the class width or interval of the data?

Fill in the Blank

What is the median?

Multiple Select

What is the first step in finding the mode?

• Divide n by 2.

• The middle most number.

• Find the Modal Class.

• Find the class.

Multiple Choice

How to find the modal class?

• divide n by 2

• get the middle most number

• look for the class interval with the highest frequency

• It's the center

Multiple Choice

What is LBmc in the mode?

• Lower Class Boundary of the mean class?

• Lower Class Boundary of the Median Class

• Lower Class Boundary of the Modal Class

• Lower Class Boundary of Class

Fill in the Blank

To find the Lower Boundary of the modal class, subtract what?

Multiple Select

What is fa in the formula?

• frequency allowed

• frequency above

• frequency alone

• frequency about

Fill in the Blank

fb in the formula is?

Fill in the Blank

What is the mode? Hint: Limit your answer until 2 decimal places. Round your answer in hundredths place.

Open Ended

Any question(s)

Unit Test 2 Coverage

• Mean, median, mode for ungrouped data

• Properties of the mean, median and mode (refer to the research 4 and the video)

• Mean, median, mode for grouped data

You may use the following during the test

• Powerpoints

• Videos

• Your own notes

• The video and notes that I will be posting tonight

Poll

How do you prepare for the test?

• Review tonight.

• Prepare all notes, calculator and everything I need.

• Ask questions and clarify things.

• I am good and ready.

Poll

Are you ready for the test tomorrow?

• Yes, I am.

• Absolutely

• No

• I am not sure.