# Transcript: How to Make a Stem and Leaf Plot

(music plays)

Sarah stands next to a wall touch screen showing a definition and a maple leaf. She is in her mid-twenties, with short straight brown hair. She wears a blue T-shirt with a print that reads "Home Work Zone" and black tights.

She says HI, TVO KIDS.

I'M TEACHER SARA.

TODAY, WE'RE GOING TO TALK A

LITTLE BIT ABOUT STEM and LEAF

PLOTS.

A STEM and LEAF PLOT IS A WAY TO

ORGANIZE DATA OR SETS OF DATA.

IT BREAKS NUMBERS DOWN TO

TWO PARTS: A STEM AND A LEAF.

IT BREAKS NUMBERS DOWN

BY USING THEIR PLACE VALUE.

She clicks on a top menu and a two-column table appears.

She continues SO LET'S SAY, THAT NOW I WANT TO

CREATE A STEM and LEAF PLOT

USING A SET OF NUMERICAL DATA.

HERE, I HAVE NUMBERS THAT

REPRESENT THE AGES

OF MY PARTY GUESTS

AT MY MOST RECENT

MATH IS FUN PARTY.

I CAN SEE THAT I HAVE FOUR

PIECES OF DATA.

She points to numbers "11, 23, 23, 37."

She continues THAT MEANS THAT

I HAVE FOUR GUESTS.

SO IN ORDER TO DO THIS,

REMEMBER THAT STEM,

REPRESENTS THE VALUE IN THE TENS

COLUMN, AND THE LEAF,

REPRESENTS THE VALUE

IN THE ONES COLUMN.

WHAT I HAVE TO DO IS TAKE A

CLOSE LOOK AT EACH PIECE OF DATA

SO MY FIRST PIECE OF DATA

IS ELEVEN.

THE FIRST THING I DO IS TAKE A

LOOK AND I IDENTIFY THE NUMBER

IN THE TENS COLUMN,

IN THIS CASE, IT'S A ONE.

SO THE ONE IS MY STEM.

THE NEXT THING THAT I HAVE TO DO

IS TAKE A LOOK AT THE NUMBER

IN MY ONES COLUMN. AND IN THIS

CASE, IT IS ALSO A ONE.

BECAUSE THE NUMBER 11 HAS ONE

TENS AND ONE ONES,

I HAVE ONE IN MY STEM,

WHICH REPRESENT MY TENS,

AND ONE IN MY LEAF,

WHICH REPRESENTS MY ONES.

THE NEXT THING I HAVE TO DO IS

REPEAT THIS PROCESS.

SO NOW I TAKE A LOOK AT

MY NEXT VALUE.

MY NEXT VALUE IS 23. IF I TAKE A

LOOK AT THE DIGIT IN MY TENS

COLUMN,

I CAN SEE THAT THIS

TIME IS A TWO.

THAT MEANS I NEED TO

START A NEW STEM.

SO I WRITE MY TWO IN MY STEM.

THE NEXT THING I HAVE TO DO IS

TAKE A LOOK AT MY ONES COLUMN.

IN THIS CASE, I CAN SEE THAT THE

VALUE 23 HAS A THREE IN THE ONES

COLUMN.

SO I'M GOING TO WRITE DOWN MY

THREE IN MY LEAF.

REPEAT THE PROCESS YET AGAIN.

I HAVE A TWO IN MY TENS COLUMN,

BUT WAIT I ALREADY HAVE ONE DOWN

THERE.

THIS MEANS, I DO NOT HAVE TO

MAKE ANOTHER STEM.

I CAN SIMPLY LEAVE THAT TWO

THERE, BECAUSE THAT STEM

ALSO WORKS FOR

THIS PIECE OF DATA.

THE NEXT THING I HAVE TO DO IS

LOOK AT MY ONES COLUMN.

I HAVE ANOTHER THREE, THIS IS

WHERE THINGS GET A LITTLE BIT

TRICKY.

ALTHOUGH WE DON'T HAVE TO DO

ANOTHER STEM OF TWO,

WE DO HAVE TO DO

ANOTHER LEAF OF THREE.

THAT IS BECAUSE

IN A STEM and LEAF PLOT,

THE NUMBER OF LEAVES

THAT YOU HAVE,

HAS TO EQUAL THE NUMBER OF DATA

CASES YOU HAVE.

AND IN THIS CASE,

WE HAVE FOUR DATA PIECES.

SO THAT THREE IS VERY IMPORTANT.

FINALLY, WE'LL DO THE SAME THING

TO OUR LAST PIECE OF DATA.

She writes down the numbers on the table using her index finger.

She continues TAKE A LOOK AT OUR TENS COLUMN,

I SEE THAT'S A THREE,

SO THAT'S A NEW STEM,

WRITE MY THREE,

AND NOW I CAN LOOK AT MY ONES

COLUMN, I SEE THAT'S A SEVEN,

SO THAT'S A NEW LEAF.

I CAN DOUBLE CHECK TO MAKE SURE

THAT THE NUMBER OF LEAFS I HAVE

EQUALS THE NUMBER OF DATA PIECES

ONE, TWO, THREE, FOUR.

I'VE GOT IT!

Now, the touch screen shows helpful hints.

She continues SO, A FEW THINGS THAT YOU NEED

TO REMEMBER:

THE FIRST THING IS TO HIGHLIGHT

OR UNDERLINE EACH PLACE

VALUE COLUMN

TO MAKE SURE YOU

DON'T MAKE AN ERROR.

DOUBLE CHECK YOUR VALUES,

LIST IT IN ORDER FROM LEAST TO

GREATEST, THAT IS VERY IMPORTANT

ONLY INCLUDE EACH DIGIT IN THE

TEN COLUMN ONE TIME,

JUST LIKE THE EXAMPLE

WE DID WITH THE 23.

BUT, IF YOU HAVE A DIGIT THAT

OCCURS MORE THAN ONCE

IN THE ONES COLUMN,

YOU DO HAVE TO WRITE THAT DOWN

EACH TIME IN YOUR LEAF.

THE NUMBER OF LEAVES THAT YOU

HAVE MUST EQUAL

THE NUMBER OF TOTAL NUMBER OF

DATA PIECES,

AND FINALLY, ALWAYS REMEMBER TO

PUT A TITLE IN YOUR GRAPH

SO THAT THE READER KNOWS EXACTLY

WHAT THE INFORMATION SHOWS.

THERE YOU HAVE IT TVO, KIDS.

STEM and LEAF PLOTS.

I'M TEACHER SARAH.

SEE YOU NEXT TIME!

Sarah stands next to a wall touch screen showing a definition and a maple leaf. She is in her mid-twenties, with short straight brown hair. She wears a blue T-shirt with a print that reads "Home Work Zone" and black tights.

She says HI, TVO KIDS.

I'M TEACHER SARA.

TODAY, WE'RE GOING TO TALK A

LITTLE BIT ABOUT STEM and LEAF

PLOTS.

A STEM and LEAF PLOT IS A WAY TO

ORGANIZE DATA OR SETS OF DATA.

IT BREAKS NUMBERS DOWN TO

TWO PARTS: A STEM AND A LEAF.

IT BREAKS NUMBERS DOWN

BY USING THEIR PLACE VALUE.

She clicks on a top menu and a two-column table appears.

She continues SO LET'S SAY, THAT NOW I WANT TO

CREATE A STEM and LEAF PLOT

USING A SET OF NUMERICAL DATA.

HERE, I HAVE NUMBERS THAT

REPRESENT THE AGES

OF MY PARTY GUESTS

AT MY MOST RECENT

MATH IS FUN PARTY.

I CAN SEE THAT I HAVE FOUR

PIECES OF DATA.

She points to numbers "11, 23, 23, 37."

She continues THAT MEANS THAT

I HAVE FOUR GUESTS.

SO IN ORDER TO DO THIS,

REMEMBER THAT STEM,

REPRESENTS THE VALUE IN THE TENS

COLUMN, AND THE LEAF,

REPRESENTS THE VALUE

IN THE ONES COLUMN.

WHAT I HAVE TO DO IS TAKE A

CLOSE LOOK AT EACH PIECE OF DATA

SO MY FIRST PIECE OF DATA

IS ELEVEN.

THE FIRST THING I DO IS TAKE A

LOOK AND I IDENTIFY THE NUMBER

IN THE TENS COLUMN,

IN THIS CASE, IT'S A ONE.

SO THE ONE IS MY STEM.

THE NEXT THING THAT I HAVE TO DO

IS TAKE A LOOK AT THE NUMBER

IN MY ONES COLUMN. AND IN THIS

CASE, IT IS ALSO A ONE.

BECAUSE THE NUMBER 11 HAS ONE

TENS AND ONE ONES,

I HAVE ONE IN MY STEM,

WHICH REPRESENT MY TENS,

AND ONE IN MY LEAF,

WHICH REPRESENTS MY ONES.

THE NEXT THING I HAVE TO DO IS

REPEAT THIS PROCESS.

SO NOW I TAKE A LOOK AT

MY NEXT VALUE.

MY NEXT VALUE IS 23. IF I TAKE A

LOOK AT THE DIGIT IN MY TENS

COLUMN,

I CAN SEE THAT THIS

TIME IS A TWO.

THAT MEANS I NEED TO

START A NEW STEM.

SO I WRITE MY TWO IN MY STEM.

THE NEXT THING I HAVE TO DO IS

TAKE A LOOK AT MY ONES COLUMN.

IN THIS CASE, I CAN SEE THAT THE

VALUE 23 HAS A THREE IN THE ONES

COLUMN.

SO I'M GOING TO WRITE DOWN MY

THREE IN MY LEAF.

REPEAT THE PROCESS YET AGAIN.

I HAVE A TWO IN MY TENS COLUMN,

BUT WAIT I ALREADY HAVE ONE DOWN

THERE.

THIS MEANS, I DO NOT HAVE TO

MAKE ANOTHER STEM.

I CAN SIMPLY LEAVE THAT TWO

THERE, BECAUSE THAT STEM

ALSO WORKS FOR

THIS PIECE OF DATA.

THE NEXT THING I HAVE TO DO IS

LOOK AT MY ONES COLUMN.

I HAVE ANOTHER THREE, THIS IS

WHERE THINGS GET A LITTLE BIT

TRICKY.

ALTHOUGH WE DON'T HAVE TO DO

ANOTHER STEM OF TWO,

WE DO HAVE TO DO

ANOTHER LEAF OF THREE.

THAT IS BECAUSE

IN A STEM and LEAF PLOT,

THE NUMBER OF LEAVES

THAT YOU HAVE,

HAS TO EQUAL THE NUMBER OF DATA

CASES YOU HAVE.

AND IN THIS CASE,

WE HAVE FOUR DATA PIECES.

SO THAT THREE IS VERY IMPORTANT.

FINALLY, WE'LL DO THE SAME THING

TO OUR LAST PIECE OF DATA.

She writes down the numbers on the table using her index finger.

She continues TAKE A LOOK AT OUR TENS COLUMN,

I SEE THAT'S A THREE,

SO THAT'S A NEW STEM,

WRITE MY THREE,

AND NOW I CAN LOOK AT MY ONES

COLUMN, I SEE THAT'S A SEVEN,

SO THAT'S A NEW LEAF.

I CAN DOUBLE CHECK TO MAKE SURE

THAT THE NUMBER OF LEAFS I HAVE

EQUALS THE NUMBER OF DATA PIECES

ONE, TWO, THREE, FOUR.

I'VE GOT IT!

Now, the touch screen shows helpful hints.

She continues SO, A FEW THINGS THAT YOU NEED

TO REMEMBER:

THE FIRST THING IS TO HIGHLIGHT

OR UNDERLINE EACH PLACE

VALUE COLUMN

TO MAKE SURE YOU

DON'T MAKE AN ERROR.

DOUBLE CHECK YOUR VALUES,

LIST IT IN ORDER FROM LEAST TO

GREATEST, THAT IS VERY IMPORTANT

ONLY INCLUDE EACH DIGIT IN THE

TEN COLUMN ONE TIME,

JUST LIKE THE EXAMPLE

WE DID WITH THE 23.

BUT, IF YOU HAVE A DIGIT THAT

OCCURS MORE THAN ONCE

IN THE ONES COLUMN,

YOU DO HAVE TO WRITE THAT DOWN

EACH TIME IN YOUR LEAF.

THE NUMBER OF LEAVES THAT YOU

HAVE MUST EQUAL

THE NUMBER OF TOTAL NUMBER OF

DATA PIECES,

AND FINALLY, ALWAYS REMEMBER TO

PUT A TITLE IN YOUR GRAPH

SO THAT THE READER KNOWS EXACTLY

WHAT THE INFORMATION SHOWS.

THERE YOU HAVE IT TVO, KIDS.

STEM and LEAF PLOTS.

I'M TEACHER SARAH.

SEE YOU NEXT TIME!

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