warm up n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Warm Up PowerPoint Presentation
Download Presentation
Warm Up

Loading in 2 Seconds...

play fullscreen
1 / 17

Warm Up - PowerPoint PPT Presentation


  • 73 Views
  • Uploaded on

Warm Up. Researchers deigned an observational study to investigate the accepted “normal” body temperature of 98.6F. In the study, 148 healthy men and women ages 18 to 40 had their temperatures taken several times over a three-day period. A total of 700 temperature readings were produced.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Warm Up' - cher


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
warm up

Warm Up

Researchers deigned an observational study to investigate the accepted “normal” body temperature of 98.6F. In the study, 148 healthy men and women ages 18 to 40 had their temperatures taken several times over a three-day period. A total of 700 temperature readings were produced.

Explain why this is an observation study and not an experiment.

To what population does the conclusion about normal body temperature apply? Justify your answer.

Look at the first dot plot (the vertical line at 98.6F is for reference). What does this graph tell you about “normal”?

Look at the second set of dot plots. How do male and female temperature compare? Write a few sentences comparing normal body temperatures for males and female in the study.

List and describe as many possible sources of variation in this study as you can.

when data is presented without a table or in no specific order like this what is the data called

Lesson 4: Stem Plots

When data is presented without a table or in no specific order like this, what is the data called?
  • 2 3 4 8 3 4 9 3 5
  • 2 7 9 5 3 7 6 2
  • 6 7 2 3 5 7 8 4

Raw Data

slide3

Definition

Sometimes the values of a variable are too spread out for us to make a reasonable dot plot by hand. In these cases, we can consider another simple graphical display called a stem plot—sometimes referred to as stem and leaf plots.

Example:

1 1 2

2 2 2 3

3 1 4

4 2 3 4 4 5

5 2

6 1 1 3

7 0

slide4

Constructing a Stem & Leaf Plot

There are 4 Steps to constructing a stem & leaf plot. They are summarized on pg. 45 of your textbook.

at an outpatient testing center the number of cardiograms performed each day for 20 days is shown

Raw Data

At an outpatient testing center, the number of cardiograms performed each day for 20 days is shown.

25 31 20 32 13

14 43 02 57 23

36 32 33 32 44

32 52 44 51 45

slide6

Constructing a Stem & Leaf Plot

Step 1:

Arrange the data in numerical order and separate/group according to the first digit

Original Raw Data

25 31 20 32 13

14 43 02 57 23

36 32 33 32 44

32 52 44 51 45

slide7

Constructing a Stem & Leaf Plot

Step 2:

Separate data into

A stem, the leading digits, consisting of all but the right-most digit

A leaf, the final digit

Stems may have as many digits as needed, but each leaf contains only a single digit.

slide8

Constructing a Stem & Leaf Plot

Step 3:

Separate data putting the leading digit in the left column with the smallest at the top and all of the final digits in their corresponding rows in increasing order

Leading digit (stem) Final Digit (leaf)

0

1

2

3

4

5

2

3 4

0 3 5

1 2 2 2 2 3 6

3 4 4 5

1 2 7

slide9

Constructing a Stem & Leaf Plot

Step 4:

Divide the leading digit and trailing digit by a vertical line

0

1

2

3

4

5

2

3 4

0 3 5

1 2 2 2 2 3 6

3 4 4 5

1 2 7

_______________________

a particular class of 18 students took a test and the grades were

Try one on your own:

A particular class of 18 students took a test and the grades were:

75 82 92 88 64

81 61 84 77 97

66 73 88 89 79

88 77 69

slide11

Answer

A particular class of 18 students took a test and the grades were:

1 4 6 9

3 5 7 7 9

1 2 4 8 8 8 9

2 7

6

7

8

9

_________________________

slide12

Key Concept

To see the overall pattern of a distribution, ignore any outliers. Describe the overall pattern of the distribution by giving the center and the spread, and see if the distribution has a simple shape that you can describe in a few words.

slide13

Key Concept

Shape:

Center:

Spread:

slide14

Key Concept

  • Whether you’re given raw data or the stem & leaf plot you will have to find….
    • Mean:
    • Median:
    • Mode:
    • Range:
slide15

Examples

Raw Data

15 22 31 40

17 32 42 18

25 31 32 41

41 41 15 20

Mean:

Median:

Mode:

Range:

slide16

Examples

Stem Plot

1 5 5 7

2 0 2 5

3 1 1 2 2

4 0 1 1 1

Mean:

Median:

Mode:

Range: