Which data would most likely show a negative relationship when graphed on a scatterplot?
1 answer:
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Answer:
61 commuters must be randomly selected to estimate the mean driving time of Chicago commuters.
Step-by-step explanation:
Given : We want 95% confidence that the sample mean is within 3 minutes of the population mean, and the population standard deviation is known to be 12 minutes.
To find : How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters?
Solution :
At 95% confidence the z-value is z=1.96
The sample mean is within 3 minutes of the population mean i.e. margin of error is E=3 minutes
The population standard deviation is s=12 minutes
n is the number of sample
The formula of margin of error is given by,
Substitute the value in the formula,
Squaring both side,
Therefore, 61 commuters must be randomly selected to estimate the mean driving time of Chicago commuters.
Answer:
Step-by-step explanation:
So, you basically want the equation of the circle.
Given:
Center(C):
The equation of circle is:
Where, represents the center point and
is the radius of the circle.
Plotting the values in the equation:
This is the equation of the circle of center (5, 2) and radius 3.