1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Stels [109]
4 years ago
9

Rescarchers are designing an experiment to compare two different types of running shoes, A and B, to investigate which type is b

etter for minimizing running time for a one-mile run. The experiment will consist of distributing the shoes to runners who are classified as either professional or recreational. A randomized block 50 recreational runners w wear either the type A shoe or the type B shoe, and their running times will be recorded for a one-mile run.
(a) What is a statistical advantage of blocking by the classification of runner? design is planned, with blocking by classification of runner. Random samples of 50 professional runners and ill be selected. Each runner within each classification will be randomly assigned to

(b) Why is it important to randomize the type of shoe the runner will wear instead of allowing the runner to choose the shoe?

(c) Explain how the design of the experiment will address replication. What is the benefit of the replication?
Mathematics
1 answer:
allochka39001 [22]4 years ago
8 0

Answer:

A.) Blocking occurs in an experiment when a certain experimental unit is divided or split into groups based on a certain criteria. In the experiment above, the experiment was blocked for class of runner, either professional or recreational. This is essential in other to limit the possible variability in our experiment. It is very possible thatvtve response of each class of runner may differ, therefore, it good practice to block for class of runner in other to contain the variation.

B.) Randomizing the type of shoe being worn by the runner ensures that we have given each runner an equal chance of selecting any type of shoe available,thereby eliminating biases which might emanate from fixing shoe type for each runner.

C.) Replication could simply be defined as the application of a certain treatment on more than one experimental unit. In the experiment above, by blocking for class of runner, hence having the professional and recreational units, and treatment applied to each experimental unit, Hence giving the experimenter the chance of controlling variation in the experiment.

Step-by-step explanation:

You might be interested in
Can anybody do this for me please
lukranit [14]

Answer:

it very simple actually, just do it what its saying from any point it wont really matter youll still get it right

Step-by-step explanation:

4 0
3 years ago
What is five fourths to the fourth power?<br><br> (5/4)^4
PilotLPTM [1.2K]
I used the calculator
2.44140625

All u have to type in is

(5÷4)^4
8 0
3 years ago
Read 2 more answers
Help please I don’t understand geometry
Scilla [17]

It would be the second option.

Good luck :D

8 0
3 years ago
Read 2 more answers
Indefinite integral need help pleaseeeeeee
tatiyna
Integrate indefinite integral:
I=\int\frac{dx}{e^{2x}+3e^x+2}dx

Solution:
1. use substitution u=e^x 
=>
du=e^xdx
=>
dx=\frac{du}{e^x}
=>
dx=\frac{du}{u}
=>
I=\int\frac{du}{u(u^2+3u+2)}du
=\int\frac{du}{u(u+2)(u+1)}du
2. decompose into partial fractions
\frac{1}{u(u+2)(u+1)}
=\frac{A}{u}+\frac{B}{u+2}+\frac{C}{u+1}
where A=1/2, B=1/2, C=-1
=\frac{1}{2u}+\frac{1}{2(u+2)}-\frac{1}{u+1}
3. Substitute partial fractions and continue
I=\int\frac{du}{2u}+\int\frac{du}{2(u+2)}-\int\frac{du}{u+1}
=\frac{log(u)}{2}+\frac{log(u+2)}{2}-log(u+1)}
4. back-substitute u=e^x
=\frac{log(e^x)}{2}+\frac{log(e^x+2)}{2}-log(e^x+1)}
=\frac{x}{2}+\frac{log(e^x+2)}{2}-log(e^x+1)}

Note: log(x) stands for natural log, and NOT log10(x)

7 0
3 years ago
A fly is standing on a boulder, which is rolling down a hill. The forward torque the fly exerts on the boulder when it has rolle
bulgar [2K]

Question:

A fly is standing on a boulder which is rolling down a hill. The forward torque the fly exerts on the boulder when it has rolled 'x' meters, in Newton meters is given by

\tau(x) = \dfrac{2}{1,000} \cdot sin \left(\dfrac{2 \cdot \pi \cdot (x + 0.2)}{4} \right )

Answer:

y = 0

Step-by-step explanation:

The general form of the sine function is presented as follows;

y = A·sin[B·(x - C)] + D

Where;

A = The amplitude

C = The horizontal shift

D = The vertical shift above the generic midline of y = 0 = Constant

By comparison with the general equation for torque, we have that the constant D = 0, therefore, the vertical shift = 0, and the midline of the the given function = The midline of the generic sine function which is y = 0.

5 0
4 years ago
Other questions:
  • Find the Correlation of the following two variables X: 2, 3, 5, 6 Y: 1, 2, 4, 5
    7·1 answer
  • How many times does 9 goes into 3000
    10·2 answers
  • If two cards are randomly chosen from a standard deck, what is the probability that a 6 is chosen, replaced, and another 6 is ch
    5·1 answer
  • If f(x) = 2X-1 + 3 and g(x) = 5x - 9, what is (f-g)(x)?
    14·1 answer
  • The length of a rectangle is one more than five
    10·1 answer
  • What is 3×584 in expanded form
    9·2 answers
  • Two equations are shown:
    12·2 answers
  • Write the equation of a line that contains (2,−2) and perpendicular to another line with slope −1.
    6·2 answers
  • Help me please TT,,,,,
    9·1 answer
  • Solve the compound inequality
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!