A lawn mower company wants to show how much time a homeowner can save by using a ride-on lawn mower instead of a push lawn mower
. The company collected data on the time (t minutes). The time also includes 5 minutes to set up the push lawn mower and 15 minutes to set up the ride-on lawn mower.
The equations for the best-fit lines for the data are shown below.
The equations for the best-fit lines for the data are shown below.
1 answer:
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Answer:
C. 55 3.5x + 15
Step-by-step explanation:
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Answer:
Step-by-step explanation:
Given
a)
we know that
therefore
on integrating we get
c=(1/6640)
b)
on doing the integration we get
=0.37349
c)
marginal density of X is
on doing integration we get
f(x)=(4x+3)/3320 ; 0<x<40
marginal density of Y is
on doing integration we get
d)
solve the above integration we get the answer
e)
solve the above integration we get the answer
f)
Two variables are said to be independent if there jointprobability density function is equal to the product of theirmarginal density functions.
we know f(x,y)
In the (c) bit we got f(x) and f(y)
f(x,y)cramster-equation-2006112927536330036287f(x).f(y)
therefore X and Y are not independent