Question

How much should a healthy Shetland pony weigh? Let x be the age of the pony (in months), and let y be the average weight of the pony (in kilograms).

x 3 6 12 17 26

y 60 95 140 166 187

(a) Make a scatter diagram of the data and visualize the line you think best fits the data. (Submit a file with a maximum size of 1 MB.)

(b) Would you say the correlation is low, moderate, or strong? low moderate strong Would you say the correlation is positive or negative? positive negative

(c) Use a calculator to verify that Σ(x) = 64, Σ(x2) = 1154, Σ(y) = 648, Σ(y2) = 94,750, and Σ(x y) = 10,114.

Compute r. (Enter a number. Round your answer to three decimal places.)

(d) As x increases from 3 to 26 months, does the value of r imply that y should tend to increase or decrease? Explain your answer.

Given our value of r, y should tend to remain constant as x increases.

Given our value of r, we can not draw any conclusions for the behavior of y as x increases.

Given our value of r, y should tend to increase as x increases.

Given our value of r, y should tend to decrease as x increases.

Answer #1

How much should a healthy Shetland pony weigh? Let x be
the age of the pony (in months), and let y be the average
weight of the pony (in kilograms).
x
3
6
12
19
24
y
60
95
140
168
173
(b) Would you say the correlation is low, moderate, or
strong?
low
moderate
strong
(c) Would you say the correlation is positive or negative?
positive
negative
(c) Use a calculator to verify that
x = 64,
x2 =...

How much should a healthy Shetland pony weigh? Let x be
the age of the pony (in months), and let y be the average
weight of the pony (in kilograms).
x
3
6
12
15
25
y
60
95
140
172
175
(a)
Make a scatter diagram of the data and visualize the line you
think best fits the data. (Submit a file with a maximum size of 1
MB.)
quiz pony.xlsx
(b)
Would you say the correlation is low,...

How much should a healthy Shetland pony weigh? Let x be the age
of the pony (in months), and let y be the average weight of the
pony (in kilograms).
x
3
6
12
14
21
y
60
95
140
152
177
(c) Use a calculator to verify that
x = 56,
x2 = 826,
y = 624,
y2 = 86,658,
and
xy = 8,275.
Compute r. (Round your answer to three decimal
places.)

How much should a healthy Shetland pony weigh? Let x be
the age of the pony (in months), and let y be the average
weight of the pony (in kilograms).
x
3
6
12
16
24
y
60
95
140
150
189
Use a calculator to verify that
x = 61, x2 = 1021, y =
634, y2 =
90,446, and xy =
9,366.
Compute r. (Round your answer to three decimal
places.)
Let x be the average number of employees in a group
health...

Let x be the average number of employees in a group health
insurance plan, and let y be the average administrative cost as a
percentage of claims. x 3 7 15 30 72 y 40 35 30 26 17
(b) Would you say the correlation is low, moderate, or strong?
positive or negative? moderate and negative moderate and positive
strong and negative low and negative low and positive strong and
positive
(c) Use a calculator (show buttons on calculator) to...

Let x be the average number of employees in a group
health insurance plan, and let y be the average
administrative cost as a percentage of claims.
x
3
7
15
35
70
y
40
35
30
26
20
(a) Make a scatter diagram of the data and visualize the line
you think best fits the data.
(b) Would you say the correlation is low, moderate, or strong?
positive or negative?
low and negative
low and positive
moderate and negative...

Let x be the average number of employees in a group
health insurance plan, and let y be the average
administrative cost as a percentage of claims.
x
3
7
15
33
72
y
40
35
30
26
16
(a) Make a scatter diagram of the data and visualize the line
you think best fits the data.
(b) Would you say the correlation is low, moderate, or strong?
positive or negative?
moderate and positive
moderate and negative
low and positive...

Let x be the average number of employees in a group
health insurance plan, and let y be the average
administrative cost as a percentage of claims.
x
3
7
15
30
75
y
40
35
30
28
20
(a) Make a scatter diagram of the data and visualize the line
you think best fits the data.
(b) Would you say the correlation is low, moderate, or strong?
positive or negative?
moderate and positive
strong and positive
low and positive...

Let x be the average number of employees in a group
health insurance plan, and let y be the average
administrative cost as a percentage of claims.
x
3
7
15
30
71
y
40
35
30
28
17
a) Make a scatter diagram of the data and visualize the line you
think best fits the data.
b) Would you say the correlation is low, moderate, or strong?
positive or negative?
strong and negative
moderate and negative l
ow and positive...

Let x be the average number of employees in a group
health insurance plan, and let y be the average
administrative cost as a percentage of claims.
x
3
7
15
36
70
y
40
35
30
28
17
(b) Would you say the correlation is low, moderate, or strong?
positive or negative?
strong and negativestrong and
positive moderate and negativemoderate
and positivelow and negativelow and positive
(c) Use a calculator to verify that Σx = 131,
Σx2 = 6479, Σy...

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