Chapter 1.1, Problem 1.23E

a)

To determine

To identify whether the observational study or experimental study.

Answer to Problem 1.23E

This is an experimental study.

Explanation of Solution

Given:

My grandmother once told me that the color red makes bees angry. Here's a method I've designed to test her claim. I'll select half of my students (by drawing names from a hat) to wear red clothes and the other half to wear white clothes. Then I'll turn a bunch of bees loose in our classroom and record how many times each student is stung.

First need to understand about the experimental study and observational study:

Experimental study: Assigning people or things to groups and applying some treatment to one group, while the other group does not receive the treatment.

Observation study: In an observational study, measure or survey members of a sample without trying to affect them.

This study is an experimental study because half of the students influenced too wear red clothes and other half to wear white clothes.

b)

To determine

To find the variables.

Answer to Problem 1.23E

Variables are red/white clothing.

Explanation of Solution

Given:

My grandmother once told me that the color red makes bees angry. Here's a method I've designed to test her claim. I'll select half of my students (by drawing names from a hat) to wear red clothes and the other half to wear white clothes. Then I'll turn a bunch of bees loose in our classroom and record how many times each student is stung.

The variables which classify the amount or category of the objects. Here, the variables are red or white clothing.

c)

To determine

To conclude whether the color red causes bees to sting more.

Answer to Problem 1.23E

No, we cannot conclude that red causes bees to sting more.

Explanation of Solution

Given:

My grandmother once told me that the color red makes bees angry. Here's a method I've designed to test her claim. I'll select half of my students (by drawing names from a hat) to wear red clothes and the other half to wear white clothes. Then I'll turn a bunch of bees loose in our classroom and record how many times each student is stung.

There are both possibilities that red or white clothing causes the bees to sting less.

d)

To determine

To comment on flaws of method.

Explanation of Solution

Given:

My grandmother once told me that the color red makes bees angry. Here's a method I've designed to test her claim. I'll select half of my students (by drawing names from a hat) to wear red clothes and the other half to wear white clothes. Then I'll turn a bunch of bees loose in our classroom and record how many times each student is stung.

Bees that are let loose in a class room are likely more aggressive, because they are locked up inside and might thus sting more.