Mean, Median, Mode, Range, Outlier Lesson

20210605-0611 G7

Mean, Median, Mode and Range

Let's Do sth Review

The most important is what is the difference

• Histogram is a CONTINUOUS data and made with INTERVAL

• Bar Graph is a DISCONTINUOUS data and made with CATEGORIES

Relative Frequency

( 相對次數 )

• Ratio of the event to the total

• RelFreq.=EVENT / TOTAL

Cumulative

Relative Frequency

( 累積相對次數 )

• ADD up the previous relative frequencies

• The last column is always the TOTAL

OKAY!!

She is Mad at me!!

Then we can start our lesson this week now

Mean ( Average )

• Share Fair

• sum / numbers of the data

Median

• Middle Number of the data

• + 1 then / 2

Mode and Range

• Mode : the most number(s) appear in the data

• Range : Max - Min

Multiple Choice

Median:
67, 74, 95, 98, 98, 99, 102

• 102
• 67
• 98
• 90.4

Multiple Choice

How many modes can you have in a data set?

• Zero
• One
• Two
• All the above

Multiple Choice

The prices at several different stores for a pair of shoes are shown below.
$78, $79, $81, $82, $83
Two days later, another store has the same shoes on sale for $65. How does the new price affect the data?

• Only the range was affected.
• The median increased, and the range increased.
• The mean increased, and the range increased.
• The mean decreased and the range increased.

Multiple Choice

Which number is not the mean, median, mode, or range of the data set 4, 3, 15, 11, 3, 8, 7, 5?

• 3
• 7
• 12
• 11

Multiple Choice

What is another word for AVERAGE?

• Mode

• Median

• Mean

• Not nice

Multiple Choice

Find the median of these numbers:
99, 32, 61, 82, 58, 41, 73, 24, 18

• 58
• 41
• 32
• 73

Multiple Choice

When finding the median, what do you do if there are two middle numbers?

• Add them together and divide by 2
• Write them both as the answer
• Give up
• Pick one

Multiple Choice

93, 100, 82, 93, 67, 100, 67, 82, 93, 93
What is the mode of this data set?

• 26
• 93
• 33
• 82

Multiple Choice

At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the mode.
12,10,10,10,13,12,11,13,10

• 13
• 12
• 11
• 10

Outlier

• the data that LIES OUTSIDE the data

• outlier effects the MEAN the most

ALMOST SLEEPING

REMEMBER

• Do the Practice-1 & Assessment

• Draw the PIG

• I will send the checklist to your PARENTS , so make up all the works BEFORE I send it to them

• See you next week ONLINE!!!