Use these ordered pairs to help your scatter plot below ( Questions are ordered 1-14) 69,60 41,23 47,38 59,30 43,37 42,47 42,30 38,30 76,80 33,30 68,50 85,87 36,31 61,45 53,47 38,31 34,58 50,44 61,45 53,47 38,31 34,58 50,44 45,35 (X,Y)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Use these ordered pairs to help your scatter plot below ( Questions are ordered 1-14) 69,60 41,23 47,38 59,30 43,37 42,47 42,30 38,30 76,80 33,30 68,50 85,87 36,31 61,45 53,47 38,31 34,58 50,44 61,45 53,47 38,31 34,58 50,44 45,35 (X,Y)
7. You should see a bunch of numbers similar to, but not
the same as, the picture to the right, as well as a new
line of fit on your scatterplot. This is the BEST line of
fit possible! Write down YOUR values for r, m, b (round
to 2 decimals), and the equation for your best line of
fit in y= mx + b form.
r=
m=
b=
8. Look back at #5. What did you guess your correlation (r) was?,
correlation (r) value, was it close to your guess from #5?
₁₁+
12. Enter this in a new row under the "Age Guessing
Table." (see pic), and you should see a new line
appear on your scatter plot.
-0.9009
-0.9492
P
-0.978224
10. Delete your line of fit by clicking the "X" to the right of it (see pic to
the right).
~ y = d
plot
6--1.01319
Y=,
9. Your correlation (r) tells you how consistent your guessing was. A correlation (r) close to O means you
are very inconsistent, but a correlation (r) close to 1 means you're very consistent! How would you
rate your consistency?
Now that you know the real
X*.
7₁ -mx-b
~--0000
11. Someone who is perfect at guessing ages and guessed every celebrity exactly correct would create
the perfectly straight line y = X. Why? Think about what y & x represent in terms of actual ages
and guessed ages.
5--108319
13. The closer your data is to the line y = X, the more accurate guesser you are! How would you rate
your accuracy?
As time allows....
14. Remember, a residual represents the distance between what actually happened (the dot) and the line
of fit. Which celebrity did you have the biggest residual (was furthest from the "perfect" line of
y = x)? How far off were you?
Transcribed Image Text:7. You should see a bunch of numbers similar to, but not the same as, the picture to the right, as well as a new line of fit on your scatterplot. This is the BEST line of fit possible! Write down YOUR values for r, m, b (round to 2 decimals), and the equation for your best line of fit in y= mx + b form. r= m= b= 8. Look back at #5. What did you guess your correlation (r) was?, correlation (r) value, was it close to your guess from #5? ₁₁+ 12. Enter this in a new row under the "Age Guessing Table." (see pic), and you should see a new line appear on your scatter plot. -0.9009 -0.9492 P -0.978224 10. Delete your line of fit by clicking the "X" to the right of it (see pic to the right). ~ y = d plot 6--1.01319 Y=, 9. Your correlation (r) tells you how consistent your guessing was. A correlation (r) close to O means you are very inconsistent, but a correlation (r) close to 1 means you're very consistent! How would you rate your consistency? Now that you know the real X*. 7₁ -mx-b ~--0000 11. Someone who is perfect at guessing ages and guessed every celebrity exactly correct would create the perfectly straight line y = X. Why? Think about what y & x represent in terms of actual ages and guessed ages. 5--108319 13. The closer your data is to the line y = X, the more accurate guesser you are! How would you rate your accuracy? As time allows.... 14. Remember, a residual represents the distance between what actually happened (the dot) and the line of fit. Which celebrity did you have the biggest residual (was furthest from the "perfect" line of y = x)? How far off were you?
A
1
41
1. Open up an internet browser and go to the following URL: http://bit.ly/2e4wt65.
+
2. On the left side of the screen, find the tab that says "Age
Guessing Table." Click under the x column and type in your
ACTUAL AGES, Under the y column, enter your GUESSES.
Everyone should have the same x column (actual ages), but your
y column (guesses) will look different from your neighbor. See
the picture to the right.
3. As you type in pairs of numbers in the x and y columns, dots
should start appearing in your graph. When you are finished, you
should have a total of 19 dots in your scatterplot.
6. Let's find your line of best fit.
● Click the "X" to the right of "Trend Line" (see
picture), and it will disappear (see pic to the right).
• Go back to the top of your "Age Guessing Table."
Click next to the x and y in the columns, and add a 1,
after the x and y (see pic to the right).
y
1
●
2²
7
4
1
0
4
5
4. Take a look at your scatter plot. Does it have a positive, negative, or no correlation (r)? How do you
know?
Positive/Negative/No (circle one) correlation becauses 90100 00
5. Looking at your scatterplot, do you think r is close to -1, -0.5, 0, 0.5, or 1? How do you know?
r is close to -1/-0.5 /0/0.5/1 (circle one) because M
2
mx1 + b. Note the
Click a new row under the table and type exactly: y1
"~" can be found by clicking the "ABC" button on the keyboard that appears,
and then selecting it (see pictures below)
9
6
3
-
functions
34
L
y. -mx, + b
Af
"Al
4
d
↑
125
N
1
2
Trend Line
d
y' = mx + b
M = 1
T
Age Guessing Table
1
(
r
X
65
1
NT
gª
M
ty
C
y
Gr
h
401
32
M41
<
X1
65
37
Actual Ages
43
U
1
A
1
Guesses
K
M
y
60
O
40
32
Transcribed Image Text:A 1 41 1. Open up an internet browser and go to the following URL: http://bit.ly/2e4wt65. + 2. On the left side of the screen, find the tab that says "Age Guessing Table." Click under the x column and type in your ACTUAL AGES, Under the y column, enter your GUESSES. Everyone should have the same x column (actual ages), but your y column (guesses) will look different from your neighbor. See the picture to the right. 3. As you type in pairs of numbers in the x and y columns, dots should start appearing in your graph. When you are finished, you should have a total of 19 dots in your scatterplot. 6. Let's find your line of best fit. ● Click the "X" to the right of "Trend Line" (see picture), and it will disappear (see pic to the right). • Go back to the top of your "Age Guessing Table." Click next to the x and y in the columns, and add a 1, after the x and y (see pic to the right). y 1 ● 2² 7 4 1 0 4 5 4. Take a look at your scatter plot. Does it have a positive, negative, or no correlation (r)? How do you know? Positive/Negative/No (circle one) correlation becauses 90100 00 5. Looking at your scatterplot, do you think r is close to -1, -0.5, 0, 0.5, or 1? How do you know? r is close to -1/-0.5 /0/0.5/1 (circle one) because M 2 mx1 + b. Note the Click a new row under the table and type exactly: y1 "~" can be found by clicking the "ABC" button on the keyboard that appears, and then selecting it (see pictures below) 9 6 3 - functions 34 L y. -mx, + b Af "Al 4 d ↑ 125 N 1 2 Trend Line d y' = mx + b M = 1 T Age Guessing Table 1 ( r X 65 1 NT gª M ty C y Gr h 401 32 M41 < X1 65 37 Actual Ages 43 U 1 A 1 Guesses K M y 60 O 40 32
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