A study to compare two methods of preserving wood started with boards of southern white pine. Each board was ripped from end to end to form two edge-matched specimens. One was assigned to Method A, the other to Method B.
1. What is the name for each of these study designs?
A) A block design. B) A matched pairs design. C) A probability sampling design. D) A stratified random sample design.

B) A matched pairs design.

Because we satisfy the condition of randomized block design. We just have two treatment conditions (Method A and B) and the information can be grouped by pairs and the researcher define a blocking variable. And all the subjects are randomly assigned to the treatments.

Step-by-step explanation:

For this case we want to compare two methods preserving wood started with boards of southern white pine.

Let's analyze one by one the possible options for this case:

A) A block design.

False. In order to satisfy a block design we need to satisfy a placebo condition at some level, and that's not the case.

B) A matched pairs design.

Because we satisfy the condition of randomized block design. We just have two treatment conditions (Method A and B) and the information can be grouped by pairs and the researcher define a blocking variable. And all the subjects are randomly assigned to the treatments.

C) A probability sampling design.

False. That's a a method for select the sample but is not appropiate used when we want to select a design

D) A stratified random sample design.

False. That's a a method for select the sample but is not appropiate used when we want to select a design

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

answer: 193

explanation:

200-7 = 193