Stats

Wood scientists are interested in replacing solid-wood building material by less expensive products made from wood flakes. Some summary statistics obtained from a study of the relationship between the length (in inches) and the strength (in pounds per square inch) of beams made from wood flakes. The scatterplot of Length versus Strength was approximately linear. We want to predict strength based on length.
Mean length = 9.500
Mean strength = 291.3
Standard Deviation length= 3.028
Standard Deviation strength = 71.2
Minimum length = 5.000
Minimum strength = 234.0
Q1 length = 6.750
Q1 strength= 242.8
Median length = 9.500
Median strength = 251.5
Q3 length= 12.250
Q3 strength = 343.3
What is the regression equation?
b1= r sy/sx= -0.882 ( 71.2/3.028)=-20.739
b0= y - b1x = 291.3 - (-20.739x 9.500)= 488.322
y= 488.322-20.739
Im getting the wrong answer

  1. 👍
  2. 👎
  3. 👁
  1. There is a calculation error for b0. It should be 488.323
    Therefore, Y=488.323+(-20.739)*x

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    The 2.0 kg wood box in the figure(Figure 1) slides down a vertical wood wall while you push on it at a 45 ∘ angle. The coefficient of kinetic friction of wood on wood is μk = 0.200. What magnitude of force should you apply to

  2. Physics

    1. A bullet of 0.0500 kg is fired into a block of wood. Knowing that the bullet left the gun with a muzzle velocity of 350. m/s, and the bullet penetrates .15 m into the block of wood, determine: a) The average force required to

  3. physics concepts (please check over my work)

    A uniform cyclinder made of lead has the same mass and the same length as a uniform solid cylinder made of wood. The rotatonal inertia of the lead cylinder compared to the wooden one is: I thought at first that the rotational

  4. math

    A cube of wood measures 5 centimeters on a side and weighs 19 grams. What is the density of the cube of wood? Will the cube of wood float in water?

  1. science

    Plywood is made by gluing together thin layers of wood. Which term best describes plywood? A.composite B.natural C.raw material D.conductor

  2. optimization calculus

    sandy is making a closed rectangular jewwellery box with a square base from two different woods . the wood for top and bottom costs $20/m^2. the wood for the side costs $30/m^2 . find dimensions that minimize cost of wood for a

  3. physics

    As shown in the diagram, a bullet of mass 7.0 g strikes a block of wood of mass 2.1 kg. The block of wood is suspended by a string of length 2.0 m, forming a pendulum. The bullet lodges in the wood, and together they swing upward

  4. Math

    Sara bought 2 boards of wood one board is 18 inches the other is 30 inches she wants to cut the wood into longest equal parts with no wood left over does Sara have enough wood for 10 equal size peices

  1. science

    The half-life of Carbon-14 is 5715 years. The Carbon-14 content of a piece of wood is that of new wood. What is the age of the ancient wood?

  2. mathematics

    A hemispherical bowl has an external radius of 18cm and is made of wood 3m thick. calculate the volume of the wood in the bowl.

  3. Physics

    an anchor shoots an arrow into a piece of wood. the arrow is traveling at 120 km/h when it strikes the wood. the arrow penetrates 3.8 cm into the wood before stopping. what is the average acceleration (in m/s^2) into the wood?

  4. Science

    A block of wood weighing 25 N is submerged under water. If the net force on the wood is 5 N upward, how much buoyant force is acting on the wood? A. 30 N upward B. 25 N downward C. 20 N upward D. 5 N upward

You can view more similar questions or ask a new question.