Head of household education. The data in the following table relate the percentage of households headed by someone with a bachelor’s degree or higher to the number of years since 2000. (Source: www.census.gov/prod/2013pubs/p20-569. pdf . ) Number of Years since 2000 Percentage of Households 0 66.0 1 75.2 3 78.3 7 84.0 9 88.5 10 89.2 11 89.9 a. Use regression (see Section R.6 ) to fit linear, cubic, and quartic functions y = f ( x ) to the data, where x is the number of years since 2000 and y is the percentage of households headed by someone with a bachelor’s degree or higher. Which function f best fits the data? b. What is the domain of f ? c. Does f have any relative extrema? How can you tell?
Head of household education. The data in the following table relate the percentage of households headed by someone with a bachelor’s degree or higher to the number of years since 2000. (Source: www.census.gov/prod/2013pubs/p20-569. pdf . ) Number of Years since 2000 Percentage of Households 0 66.0 1 75.2 3 78.3 7 84.0 9 88.5 10 89.2 11 89.9 a. Use regression (see Section R.6 ) to fit linear, cubic, and quartic functions y = f ( x ) to the data, where x is the number of years since 2000 and y is the percentage of households headed by someone with a bachelor’s degree or higher. Which function f best fits the data? b. What is the domain of f ? c. Does f have any relative extrema? How can you tell?
Solution Summary: The author explains how to calculate the curve fitting of given data in linear, cubic, and quartic functions.
Head of household education. The data in the following table relate the percentage of households headed by someone with a bachelor’s degree or higher to the number of years since 2000.
a. Use regression (see Section R.6) to fit linear, cubic, and quartic functions
y
=
f
(
x
)
to the data, where x is the number of years since 2000 and y is the percentage of households headed by someone with a bachelor’s degree or higher. Which function
f
best fits the data?
b. What is the domain of
f
?
c. Does f have any relative extrema? How can you tell?
Definition Definition Probability of occurrence of a continuous random variable within a specified range. When the value of a random variable, Y, is evaluated at a point Y=y, then the probability distribution function gives the probability that Y will take a value less than or equal to y. The probability distribution function formula for random Variable Y following the normal distribution is: F(y) = P (Y ≤ y) The value of probability distribution function for random variable lies between 0 and 1.
A company specializing in lubrication products for vintage motors produce two
blended oils, Smaza and Nefkov. They make a profit of K5,000.00 per litre of
Smaza and K4,000.00 per litre of Nefkov. A litre of Smaza requires 0.4 litres of
heavy oil and 0.6 litres of light oil. A litre of Nefkov requires 0.8 litres of heavy oil
and 0.2 litres of light oil. The company has 100 litres of heavy oil and 80 litres of
light oil. How many litres of each product should they make to maximize profits
and what level of profit will they obtain? Show all your workings.
1. Show that the vector field
F(x, y, z)
=
(2x sin ye³)ix² cos yj + (3xe³ +5)k
satisfies the necessary conditions for a conservative vector field, and find a potential function for
F.
1. Newton's Law of Gravitation (an example of an inverse square law) states that the magnitude
of the gravitational force between two objects with masses m and M is
|F|
mMG
|r|2
where r is the distance between the objects, and G is the gravitational constant. Assume that the
object with mass M is located at the origin in R³. Then, the gravitational force field acting on
the object at the point r = (x, y, z) is given by
F(x, y, z) =
mMG
r3
r.
mMG
mMG
Show that the scalar vector field f(x, y, z) =
=
is a potential function for
r
√√x² + y² .
Fi.e. show that F = Vf.
Remark: f is the negative of the physical potential energy, because F = -V(-ƒ).
Calculus for Business, Economics, Life Sciences, and Social Sciences (14th Edition)
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