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Stats Boot Camp

Analyzing a Straight Line:

A Part of the Boot Camp for the Intro to Statistics Course

Each slide has its own narration. Click on the audio icon to start it.

Professor Friedman's Statistics Course by H & L Friedman is licensed under a �Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. 

This module is part of our Introduction to Statistics course. See more at https://stats.proffriedman.net/

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Graphing a Straight Line (1/6)

  • Suppose we would like to graph the following data:

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Stats Boot Camp

X

Hours

Studied

Y

Grade

On Quiz

1

35

2

45

3

55

4

65

5

75

Simple, right? Here it is:

[In fact, any two (x,y) points would do in this case to draw the line.]

Y

X

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Graphing a Straight Line (2/6)

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  • What if we would like to answer the following questions:
    • What would we expect the quiz grade to be if hours studied = 6?
    • What about 0 hours studied?
    • Do we know how much the quiz grade increases for every additional hour studied?
  • We can do all of that and more by finding the equation for this line.

Stats Boot Camp

  • It’s a pretty graphic, but we can do much more.

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Graphing a Straight Line (3/6)

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Stats Boot Camp

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Graphing a Straight Line (4/6)

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Stats Boot Camp

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Graphing a Straight Line (5/6)

  • Here’s another example of data that graphs onto a straight line. What is the equation?

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Stats Boot Camp

X

Y

1

45

2

40

3

35

4

30

5

25

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Graphing a Straight Line (6/6)

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Stats Boot Camp

X

Y

1

45

2

40

3

35

4

30

5

25

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Boot Camp – End of this module

  • This Boot Camp was designed to give you some of the tools you need to successfully work through your Introduction to Statistics course.
  • To see the rest of the Boot Camp, visit the full course at http://stats.proffriedman.net/

Stats Boot Camp