Mean call-to-shock time, 26 79 12 Survival rate, y 91 44 32 44 LA USE SALT (a) Construct a scatterplot for these data 10 12 10 10 12 100 How would you describe the relationship between mean call-to-shock time and survival rate? There is a strong positive relationship. The relationship is close to being linear, particularly if the point with the lowest value is disregarded. If that point is included then there is the suggestion of a curve There is a strong negative relationship. The relationship is close to being linear particularly if the point with the lowest value is disregarded. If that point is included then there is the suggestion of a curve There is a strong positive relationship. The relationship is close to being linear, particularly if the point with the highest value is disregarded. If that point is included then there is the suggestion of a curve There is a strong negative relationship. The relationship is close to being linear particularly if the point with the highest value is disregarded. If that point is included then there is the suggestion of a curve (b) Find the equation of the least-squares ine. (Round your values to four decimal places) (c) Use the least squares line to predict survival rate for a community with a ean call-to-shock time of 8 minutes. (Round your answer to three decimal places)

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Studies have shown that people who suffer sudden cardiac arrest have a better chance of survival if a defibrillator shock is
administered very soon after cardiac arrest. How is survival rate related to the time between when cardiac arrest occurs and when
the defibrilator shock is delivered?
The accompanying data give y
survival rate (percent) and x mean call-to-shock time (minutes) for a cardiac rehabilitation
center (in which cardiac arrests occurred while victims were hospitalized and so the cal-to-shock time tended to be short) and for
four communities of different sizes.
LA USE SALT
(a) Construct a scatterplot for these data.
12
10
100
BO
60
Mean call-to-shock time, x 26 79 12
Survival rate, y
20
10
100
8 10 12
100
80
60
40
20
12
10
8
4
2
4
40
6
11 10 12
80
100
How would you describe the relationship between mean call-to-shock time and survival rate?
There is a strong positive relationship. The relationship is close to being linear, particularly if the point with the lowest
* value is disregarded. If that point is included then there is the suggestion of a curve.
(b) Find the equation of the least-squares line. (Round your values to four decimal places.)
9-
There is a strong negative relationship. The relationship is close to being linear, particularly if the point with the lowest
x value is disregarded. If that point is included then there is the suggestion of a curve.
There is a strong positive relationship. The relationship is close to being linear, particularly if the point with the highest
x value is disregarded. If that point is included then there is the suggestion of a curve
There is a strong negative relationship. The relationship is close to being linear, particularly if the point with the highest
value is disregarded. If that point is included then there is the suggestion of a curve
(c) Use the least squares line to predict survival rate for a community with a mean call-to-shock time of 8 minutes. (Round
your answer to three decimal places)
Transcribed Image Text:Studies have shown that people who suffer sudden cardiac arrest have a better chance of survival if a defibrillator shock is administered very soon after cardiac arrest. How is survival rate related to the time between when cardiac arrest occurs and when the defibrilator shock is delivered? The accompanying data give y survival rate (percent) and x mean call-to-shock time (minutes) for a cardiac rehabilitation center (in which cardiac arrests occurred while victims were hospitalized and so the cal-to-shock time tended to be short) and for four communities of different sizes. LA USE SALT (a) Construct a scatterplot for these data. 12 10 100 BO 60 Mean call-to-shock time, x 26 79 12 Survival rate, y 20 10 100 8 10 12 100 80 60 40 20 12 10 8 4 2 4 40 6 11 10 12 80 100 How would you describe the relationship between mean call-to-shock time and survival rate? There is a strong positive relationship. The relationship is close to being linear, particularly if the point with the lowest * value is disregarded. If that point is included then there is the suggestion of a curve. (b) Find the equation of the least-squares line. (Round your values to four decimal places.) 9- There is a strong negative relationship. The relationship is close to being linear, particularly if the point with the lowest x value is disregarded. If that point is included then there is the suggestion of a curve. There is a strong positive relationship. The relationship is close to being linear, particularly if the point with the highest x value is disregarded. If that point is included then there is the suggestion of a curve There is a strong negative relationship. The relationship is close to being linear, particularly if the point with the highest value is disregarded. If that point is included then there is the suggestion of a curve (c) Use the least squares line to predict survival rate for a community with a mean call-to-shock time of 8 minutes. (Round your answer to three decimal places)
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