What is the correlation coefficient r for the data set? enter your answer to the nearest hundredth in the box. r = x y 25 240 26
1 answer:
The use of the excel tool given in the image above will give you the correlation coefficient of r for the data set is as r=-0.96
<h3>What is the correlation coefficient about?</h3>Note that one have to find first, the mean of all of your the x-values, and then one can find the mean of all of the y-values.
Note that one can use the excel to find the mean which will be 28.4 and 214.6 for both.
The next step is to find the standard deviation for x and y. Then, you have to put it into the formula that is given for the correlation coefficient."
When you use the excel, R will be -0.9647 and when you round up to the nearest hundredth, the answer will be -0.96.
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Answer:
3 times
Explanation:
When the dough is folded, it increases by a constant factor. We can model the growth of the thickness using the exponential growth model
Where:
Initial thickness, = 2mm
Growth factor, r =8%=0.08
We want to find the smallest number of times Soon Yi will have to roll and fold the dough so that the resulting dough is at least 2.5mm.
i.e When
Therefore, the smallest number of times Soon Yi will have to roll and fold the dough so that the resulting dough is at least 2.5mm thick is 3.