Dot Stem Leaf Plots

Review

Let's see what you remember from the last two lessons on dot plots & Histograms.

Multiple Choice

This is a;

• Dot plot

• Histogram

• Bar chart

• Stem& Leaf plot

Multiple Choice

This is a;

• Dot plot

• Histogram

• Bar chart

• Stem& Leaf plot

Multiple Choice

This is a;

• Dot plot

• Histogram

• Bar chart

• Stem& Leaf plot

Multiple Choice

This is a;

• Dot plot

• Histogram

• Bar chart

• Stem& Leaf plot

Multiple Choice

To find the _________ you add up all the numbers and then divide by how many numbers you have.

• Mean

• Median

• Mode

• Range

Multiple Choice

To find the ________ you put all numbers in order from least to greatest and find the number that is in the middle.

• Mean

• Median

• Mode

• Range

Multiple Choice

To find the ________ you put all numbers in order from least to greatest and find the number that is in the middle.

• Mean

• Median

• Mode

• Range

Multiple Choice

A data set can have more than one mode

• True

• False

Multiple Choice

A data set can have more than one mean

• True

• False

Multiple Choice

A data set can have more than one median?

• True

• False

Multiple Choice

A data set can have more than one range?

• True

• False

Multiple Choice

To find the average of a set of numbers, add up all the items and divide by...

• 2

• The minimum

• The maximum

• The number of items

Multiple Choice

To find the average of a set of numbers, add up all the items and divide by...

• 2

• The minimum

• The maximum

• The number of items

Multiple Choice

The mode score on the 6th grade math test was 94! Which of these interpretations must be correct?

• 99 was the highest score on the test.

• More students received a 94 than any other score

• No student scored below a 50

• A score of 91 was slightly below average.

Multiple Choice

To find the ______ you put all numbers in order from least to greatest and then take the largest number minus the smallest number.

• Mean

• Median

• Mode

• Range

Multiple Choice

The mode(s) of this dot plot is(are);

• 8

• 10

• 8 & 10

• 15

Multiple Choice

The median of this dot plot is;

• 8

• 10

• 8 & 10

• 11

Multiple Choice

The range of this dot plot is;

• 8

• 15

• 7

• 11

Multiple Choice

The total number of items represented by this dot plot is;

• 30

• 35

• 50

• 34

Multiple Choice

The modal score according to this histogram is

• 60-80

• 40

• 80-100

• 40-60

Multiple Choice

The total number of students represented by this histogram is approximately

• 50

• 60

• 80

• 100

Multiple Choice

The total number of colors represented by this bar chart is;

• 5

• 10

• 34

Multiple Choice

The total number of children represented by this bar chart is approximately;

• 5

• 10

• 34

10.3 Stem & Leaf Diagrams

Lesson objectives;

• Tell what a stem & leaf diagram is

• Read & interpret data from stem & leaf

• Draw a stem & Leaf

• Find mean, median & mode from a stem & Leaf

Multiple Choice

This is a stem & Leaf plot;

• How should I know?

• YES

• NO

• MAYBE

Multiple Choice

TRUE or FALSE? (you may use google)

A Stem and Leaf Plot is a table where each data value is split into a "stem" (the first digit(s) and a "leaf" (the last digit(s).

• How should I know?

• TRUE

• FALSE

Multiple Choice

Textbook Page 79;

What is the most significant digit?

• The first non zero digit (when reading from left to right)

• The last non zero digit (when reading from left to right)

• All the digits of any number

• All non zero digits of a number

Multiple Choice

What is a significant digit?

• The first non zero digit (when reading from left to right)

• The last non zero digit (when reading from left to right)

• All the digits of any number

• All non zero digits of a number

Multiple Choice

Textbook Page 79;

On a stem and leaf plot, the more significant digits (on the left) form the STEM

• TRUE

• FALSE

Multiple Choice

Textbook Page 79;

On a stem and leaf plot, the less/next significant digits (on the right) are displayed as the LEAVES

• YES

• WHO KNOWS?

Multiple Choice

Who developed the stem and leaf?

• American Mathematician, John W Turkey

• This guy

• We're suffering because of him

• Why do I need to know this?

Multiple Select

Why is it important to know / study stem and leaf plots? (2 answers)

• It's another data representation tool / chart

• So we know how to interpret them when we find them somewhere!

• Math math math

• Because. ......

Fill in the Blank

A stem and leaf plot must always have a ___

Multiple Choice

Why do you need a key on a stem and leaf plot?

• It indicates the place values for the stem and leaf columns

• You don't need one

• It indicates the mean, median and mode

• It indicates the place values for the average

Multiple Choice

What is wrong with this stem and leaf diagram?

• Nothing- it's all correct.

• The order.

• It's missing a key.

• The title.

Multiple Select

What's wrong with this Stem & Leaf plot? (select 2 answers)

• Nothing

• It's missing a key

• There's no title

• The 0 stem is not part of the data values

Multiple Choice

Which of these charts shows you all the data values in the data set?

• Histogram

• Bar chart

• Stem and leaf

Multiple Choice

Jenny records the heights of her family members. The heights, in inches, are 50, 53, 45, 52, 68, 56 47, 69, and 60. The stem-and-leaf plot shows some of the data.

What are the leaves for stem 5?

• 2, 3, 7

• 0, 2, 3, 5

• 0, 2, 3, 6

• 2, 3, 5

Multiple Choice

The distances Clea biked weekly, in miles,

are 49, 31, 36, 41, 28, 44, 23, 34, 32, 33,

and 25. The stem-and-leaf plot shows some

of the data.

What are the leaves for stem 2?

• 1, 2, 3, 4, 6

• 3, 5, 8

• 2, 3, 5, 6

• 2, 3, 5, 8

Multiple Choice

Ted records the heights of the

sunflowers in his family’s garden. In

inches, the heights are 24, 11, 21, 18,

15, 25, 30, 13, 23, and 36. The stemand-

leaf plot shows some of the data.

What leaves should Ted write for

stem 1?

• 1, 3, 5, 8

• 1, 3, 8

• 1, 2, 3, 5, 8

• 2, 3, 5, 8

Multiple Choice

What is the minimum quiz score in this data set?

Hint; Combine the first value in the first stem with the first value in the leaf column.

• 0

• 4

• 9

• 40

Multiple Choice

What is the maximum quiz score in this data set?

Hint; Combine the first value in the last stem with the last value in the leaf column.

• 92

• 96

• 49

• 40

Multiple Choice

What is the range of the quiz scores in this data set?

Hint; Range = Maximum value - minimum value

• 46

• 96

• 56

• 40

Multiple Choice

How many students' scores are represented by this data set?

Hint; Count all the leaves in the stem & leaf plot

• 10

• 24

• 9

• 18

Multiple Choice

How many games did the team play?

Hint; Count all the leaves

• 15

• 12

• 24

• 14

Multiple Choice

This plot represent the number of cookies eaten at a county fair. What was the greatest amount of cookies eaten?

• 97

• 100

• 10

• 96

Multiple Choice

How many students scored more than 80%?

• 10

• 13

• 7

• 15

Multiple Choice

How many students got a perfect score on the test?

• 0

• 2

• 6

• 1

Multiple Choice

Which set of data below would be organized best in a Stem and Leaf Plot?

• 5,5,5,4,4,7,7,7

• 34, 56, 44, 46, 45, 37, 53

• 0,0,0,1,1,1,1,2,3,3,3

• 100, 500, 350, 295, 807

Multiple Choice

The graph above represents the results of a survey regarding the amount of Pokemon cards people own. Which statement could be true based on the data in the graph?

• Some of the people surveyed do not own any Pokemon cards.

• Over ten people own more than 50 Pokemon Cards.

• 11 people surveyed own less than 10 Pokemon cards.

Multiple Choice

What is the Maximum data item on this stem and leaf plot?

• 56%

• 88%

• 94%

• 8122348%

Multiple Choice

What is the Mode of this data?

Hint; Mode is the number that appears the most. Look for the leaf that appears the most times, then combine it with its stem.

• 96

• 97

• 68

• 802

Multiple Choice

Find the mean?

Hint; Add all the values, divide by the total number of items.

• 3.3

• 99

• 97.4

• 98

Multiple Choice

Find the Median?

Hint; The diagram is already arranged in order, look for the leaf in the middle, then combine it with its stem.

• 95

• 97.2

• 96.8

• 98

Multiple Choice

What is the range?

Hint; Max - min

• 97.2

• 4

• 3.3

• 3.2

Multiple Choice

What is the Mode?

• 97.4

• 97.2

• 97

• 96.8

Multiple Choice

How does the median number of miles driven for Driver A compare to the median number of miles driven for Driver B?

• Driver B drives much less than Driver A when comparing medians.

• The medians are the same

• Driver A drives much less than Driver B when comparing medians.

• Driver A and Driver B make the same amount of money.

Multiple Choice

Using the data from this stem and leaf plot, which class would have the highest median score

• Class A

• Class B

Multiple Choice

In how many games did the team score more than 20 points?

• 8

• 7

• 10

• 9

Multiple Choice

This stem and leaf diagram shows the ages of a group of people. How old is the youngest member of this group?

• 14

• 10

• 15

• 1

Multiple Choice

This stem and leaf diagram shows the ages of a group of people. How many people in this group are younger than 20?

• 3

• 8

• 4

• 5

Multiple Choice

This stem and leaf diagram shows the heights of Mrs Smith's flowers. How many flowers have a height of 14cm?

• 3

• 1

• 0

• 2

Multiple Choice

This stem and leaf diagram shows the marks achieved by students in Mrs Turner's class. How many girls are there in the class?

• 11

• 5

• 22

• 16

Multiple Choice

This stem and leaf diagram shows the marks achieved by students in Mrs Turner's class. What was the highest mark in the class?

• 47

• 109

• 45

• 29

Multiple Choice

This stem and leaf diagram shows the marks achieved by students in Mrs Turner's class. How many students got more than 24 marks?

• 14

• 16

• 15

• 12

Multiple Choice

What mistake has been made when making this stem and leaf diagram?

• The stem should only have one number in it.

• The key is incorrect.

• There is a number missing.

• There are no mistakes - the stem and leaf diagram is correct.

Multiple Choice

This stem and leaf diagram shows the marks achieved by students in Mrs. Turner's class. What is the difference between the modes of the two boys and girls?

• 5

• How do you do this?

• 33

• 38 & 33

Multiple Choice

This stem and leaf diagram shows the marks achieved by students in Mrs. Turner's class. What is the difference between the medians of the two boys & girls?

• 3

• How do you do this?

• 4

• 36 & 33

Practice task;

Choose one item from this list and create a stem and leaf plot using date from your classmates. Submit your work on google classroom;

• The ages of all people in your class

• The shoe sizes of all students in your class

• The pinky lengths of the students in your class

• The number of movies watches last week by the people in your class