. You would like to determine if there is a statistical relationship between the amount of caffein in a cup of coffee and their sales at their coffee franchises. The data is included in the set "Coffee by the Cup". Here is information about the variables. Variable Measurement Units Caffeine Amount of caffeine in one cup Milligrams Cups sold Number of cups of the coffee sold at all of the franchises Cups Sold
Family of Curves
A family of curves is a group of curves that are each described by a parametrization in which one or more variables are parameters. In general, the parameters have more complexity on the assembly of the curve than an ordinary linear transformation. These families appear commonly in the solution of differential equations. When a constant of integration is added, it is normally modified algebraically until it no longer replicates a plain linear transformation. The order of a differential equation depends on how many uncertain variables appear in the corresponding curve. The order of the differential equation acquired is two if two unknown variables exist in an equation belonging to this family.
XZ Plane
In order to understand XZ plane, it's helpful to understand two-dimensional and three-dimensional spaces. To plot a point on a plane, two numbers are needed, and these two numbers in the plane can be represented as an ordered pair (a,b) where a and b are real numbers and a is the horizontal coordinate and b is the vertical coordinate. This type of plane is called two-dimensional and it contains two perpendicular axes, the horizontal axis, and the vertical axis.
Euclidean Geometry
Geometry is the branch of mathematics that deals with flat surfaces like lines, angles, points, two-dimensional figures, etc. In Euclidean geometry, one studies the geometrical shapes that rely on different theorems and axioms. This (pure mathematics) geometry was introduced by the Greek mathematician Euclid, and that is why it is called Euclidean geometry. Euclid explained this in his book named 'elements'. Euclid's method in Euclidean geometry involves handling a small group of innately captivate axioms and incorporating many of these other propositions. The elements written by Euclid are the fundamentals for the study of geometry from a modern mathematical perspective. Elements comprise Euclidean theories, postulates, axioms, construction, and mathematical proofs of propositions.
Lines and Angles
In a two-dimensional plane, a line is simply a figure that joins two points. Usually, lines are used for presenting objects that are straight in shape and have minimal depth or width.
part D& E
![3. You would like to determine if there is a statistical relationship between the amount of caffein in
a cup of coffee and their sales at their coffee franchises. The data is included in the set "Coffee
by the Cup". Here is information about the variables.
Variable
Measurement
Units
Caffeine
Amount of caffeine in one cup
Milligrams
Cups sold
Cups Sold
Number of cups of the coffee
sold at all of the franchises
Which variable is the explanatory variable and which variable is the response variable?
Construct a scatterplot of the data. Based upon the scatterplot is there a linear relationship
a.
b.
between the amount of caffeine in one cup of the coffee and the number of cups of coffee
sold? Justify your reasoning using the scatterplot.
Run a t-test for correlation using technology. Make sure you include the p-value and the
printout. According to the t-test, is there a statistical relationship between the amount of
caffeine in a cup of coffee and the number of cups sold? Justify your reasoning using the
results of the test.
C.
d. Find the correlation coefficient for caffeine and cups of coffee sold.
a. Interpret the correlation coefficient in terms of its strength and direction.
b. Complete the following sentence: According to the correlation coefficient, If you
(increase/decrease) the amount of a caffeine in a cup of coffee, then this will
(increase/decrease) the number of cups sold. Choose either increase or decrease for
each of the blanks.
Or write:
There is no relationship between the amount of caffeine in a cup of coffee and the
number of cups sold.
e. What percentage of the variability in the number of cups sold is on account of the amount of
caffeine in each cup? Explain how you know.
f.
State the linear regression line (you should use technology to find it). Determine based upon
the information from b-d whether or not the regression line is appropriate to use to predict
the number of cups sold based upon the amount of caffeine in the cups.
g. Predict the number of cups that would be sold if the amount of caffeine in the cup with 200
mg of caffeine.
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![2:52
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Coffee_by_the_Cup.csv
mg of Caffeine Cups Sold
155
1215
200
1311
175
564
235
1900
247
1750
258
1427
180
280
205
750
310
2100
178
789
256
1500
288
1670
290
2000
199
1233
260
1400
000
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