What type of association is shown by the data in the scatter plot?
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Question 2
2.
Which equation best models the data shown in the scatter plot?
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1
Question 3
3.
Choose the type of correlation obtains between x and y values in the following data table.
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Question 4
4.
Using the data from question 3, which trend line best fits the data?
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Question 5
5.
The following scatterplot shows a point marking the height and weight of each individual in the data set. Select all the statements that are true about a line of best fit for the data.
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Question 6
6.
We learn that an 'Earth Day' is 24 hours long, and that more precisely it is 23 hours 56 minutes and 4 seconds long. But this hasn't always been the case. Detailed studies of fossil shells, and the banded deposits in certain sandstones, reveal a much different length of day in past eras! These bands in sedimentation and shell-growth follow the lunar month and have individual bands representing the number of days in a lunar month. By counting the number of bands, geologists can work out the number of days in a year, and from this the number of hours in a day when the shell was grown, or the deposits put down. The table below shows the results of one of these studies.
According to this data, we can model the length of the day in hours as a function of the number of millions of years from the current data. From a linear regression of the scatter plot data, we find the function that best fits the information is something like
f(x)=0.007x+24.4,
where x is the number of millions of years from the present day, and f(x) is the length of the day in hours.
Assuming the trend continues, about how many hours long will a day be 500 million years from now?