Questions from Statistics Principles

Q: What is the role of randomization in a designed experiment? If

What is the role of randomization in a designed experiment? If you were conducting a completely randomized design with three treatments and 90 experimental units, describe how you would randomly assig...

Q: Treatments may be a combination of factors rather than a single factor

Treatments may be a combination of factors rather than a single factor. For example, suppose we want to investigate the role of diet and drugs in weight loss. Suppose we have three diet plans (a satur...

Q: Define the following: (a) Experimental unit (

Define the following: (a) Experimental unit (b) Treatment (c) Response variable (d) Factor (e) Placebo (f) Confounding (g) Blinding

Q: What is replication in an experiment?

What is replication in an experiment?

Q: Explain the difference between a single-blind and a double-

Explain the difference between a single-blind and a double- blind experiment.

Q: A(n)_____design is one in which each experimental unit

A(n)_____design is one in which each experimental unit is randomly assigned to a treatment. A(n)____design is one in which the experimental units are paired up.

Q: Observational studies are used to determine causality between an explanatory variable and

Observational studies are used to determine causality between an explanatory variable and response variable.

Q: What is a bar graph? What is a Pareto chart?

What is a bar graph? What is a Pareto chart?

Q: Internet connection speed in kilobytes per second

Internet connection speed in kilobytes per second

Q: This USA Today–type chart shows the top responses to the

This USA Today–type chart shows the top responses to the question, “Who’s the most difficult to ‘sell yourself’ to?” (a) What was the most common response? (b) The survey is of 1053 adults. How many s...