Question
In: Statistics and Probability
Does knee height predict overall height? Since elderly people may have difficulty standing to have their...
Does knee height predict overall height? Since elderly people may have difficulty standing to have their heights measured, a study looked at predicting overall height (y) in centimeters, from height to the knee (x) in centimeters. Use this data to answer the following questions.
|
Data looking at knee height (in cm) and overall height (in cm) |
||||||
|
Knee Height (cm) |
57.70 |
47.40 |
43.50 |
44.80 |
55.20 |
54.60 |
|
Overall Height (cm) |
192.10 |
153.30 |
146.40 |
162.70 |
169.10 |
177.80 |
What is the mean x and standard deviation sxof x?
What is the mean y and standard deviation sy of y?
What is the correlation r of x and y? What does the correlation mean?
The least-squares regression line.
What is the value of the slope?
What is the value of the intercept?
What is the equation of the least-squares regression line?
What is the equation of the least-squares regression line?
What is the coefficient of determination r2AND what does it tell you about the least-squares regression line?
What is the predicted height for someone with a knee height of 46.30?
Someone with a knee height of 65 cm would be approximately 220 cm tall. Is this a good use of the least-squares regression line? Why or why not?
Solutions
orchestra answered 1 year agoRelated Solutions
Does knee height predict overall height? Since elderly people may have difficulty standing to have their...
Does knee height predict overall height? Since elderly people
may have difficulty standing to have their heights measured, a
study looked at predicting overall height (y) in centimeters, from
height to the knee (x) in centimeters. Use this data to answer the
following questions.
Data looking at knee height (in cm) and overall height
(in cm)
Knee
Height (cm)
57.70
47.40
43.50
44.80
55.20
54.60
Overall Height (cm)
192.10
153.30
146.40
162.70
169.10
177.80
What is the mean x and...
Because elderly people may have difficulty standing to have their height measured, a study looked at...
Because elderly people may have difficulty standing to have
their height measured, a study looked at the relationship between
overall height and height to the knee. Here are data (in
centimeters) for five elderly men: Knee Height ? 56.5 46.3 41.2
47.7 52.7 Height ? 192.4 151.8 149.7 162.1 174.5 What is the
equation of the least-squares regression line for predicting height
from knee height? ANSWER: ?̂ =
Because elderly people may have difficulty standing to have their height measured, a study looked at...
Because elderly people may have difficulty standing to have
their height measured, a study looked at the relationship between
overall height and height to the knee. Here are data (in
centimeters) for five elderly men: Knee Height x 57.2 45.7 42.9
45.6 52.4 Height y 191.6 153.7 145.2 163.6 174.3 What is the
equation of the least-squares regression line for predicting height
from knee height? ANSWER: ŷ =
1: A nurse may have difficulty implementing a middle-range theory that a. Does not support personal...
1: A nurse may have difficulty implementing a middle-range
theory that
a. Does not support personal experience
b. Results in an intended outcome
c. Has applicability in many different nursing environments
d. All of the above
2: Middle-range theories are based on
a. Research
b. Personal experience
c. Observation
d. All of the above
3: To be considered a middle-range theory, what does a nursing
theory require?
a. Support from the academic nursing community
b. Ties to pre-existing nursing theories...
Because some people are unable to stand to have their height measured, doctors use the height...
Because some people
are unable to stand to have their height measured, doctors use the
height from the floor to the knee to approximate their patients’
height (in cm).
Height of Knee
Overall Height
57.7
192.3
47.5
153.3
43.5
146.2
44.8
160.4
55.6
171.4
54.9
176.7
a. Use Excel to
determine the correlation coefficient of this data
b. Use Excel to
determine the regression equation of this data
c. Find the overall
height from a knee height of 45.3 cm...
Because some people are unable to stand to have their height measured, doctors use the height...
Because some people are unable to stand to have their height
measured, doctors use the height from the floor to the knee to
approximate their patients’ height (in cm).
Height of Knee
Overall Height
57
192
47
153
43
146
44
160
55
171
54
176
a. Use Excel to determine the correlation coefficient of this
data
b. Use Excel to determine the regression equation of this
data
c. Find the overall height from a knee height of 45.3 cm...
A psychologist noted that people have more difficulty sleeping in a bright room than in a...
A psychologist noted that people have more difficulty sleeping
in a bright room than in a dark room. She measured whether the
intensity of the light could predict the time it took a sample of 4
participants to fall asleep. The data for this hypothetical study
are listed in the following table.
Intensity
of
Light (in watts)
Time It
Took to
Sleep (in minutes)
X
Y
5
13
10
20
20
32
40
37
Compute an analysis of regression for...
A psychologist noted that people have more difficulty sleeping in a bright room than in a...
A psychologist noted that people have more difficulty sleeping
in a bright room than in a dark room. She measured whether the
intensity of the light could predict the time it took a sample of 4
participants to fall asleep. The data for this hypothetical study
are listed in the following table.
Intensity
of
Light (in watts)
Time It
Took to
Sleep (in minutes)
X
Y
5
8
10
16
20
27
40
34
Compute an analysis of regression for...
A psychologist noted that people have more difficulty sleeping in a bright room than in a...
A psychologist noted that people have more difficulty sleeping
in a bright room than in a dark room. She measured whether the
intensity of the light could predict the time it took a sample of 4
participants to fall asleep. The data for this hypothetical study
are listed in the following table.
Intensity
of
Light (in watts)
Time It
Took to
Sleep (in minutes)
X
Y
5
12
10
21
20
33
40
36
Compute an analysis of regression for...
A psychologist noted that people have more difficulty sleeping in a bright room than in a...
A psychologist noted that people have more difficulty sleeping
in a bright room than in a dark room. She measured whether the
intensity of the light could predict the time it took a sample of 4
participants to fall asleep. The data for this hypothetical study
are listed in the following table.
Intensity
of
Light (in watts)
Time It
Took to
Sleep (in minutes)
X
Y
5
10
10
18
20
32
40
36
Compute an analysis of regression for...
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