Killing weeds A biologist would like to determine which of two brands of weed killer, X or Y, is less likely to harm the plants in a garden at the university. Before spraying near the plants, the biologist decides to conduct an experiment using$24$individual plants. Which of the following two plans for randomly assigning the treatments should the biologist use? Why?

Plan A: Choose the$12$healthiest-looking plants. Then flip a coin. If it lands heads, apply Brand X weed killer to these plants and Brand Y weed killer to the remaining$12$plants. If it lands tails, do the opposite.

Plan B: Choose$12$of the$24$plants at random. Apply Brand X weed killer to those$12$plants and Brand Y weed killer to the remaining$12$plants.

Step by step solution

01

Given Information

We are given that the biologist wants to check whether from X or Y which will harm the plans, and that they have two plans, Plan A and Plan B, and we have to find out which plan is following random assignment.

02

Explanation

According to the question, a biologist has to choose the plan that follows random assignment. Random assignment means that the particular should be choose randomly but in Plan A twelve plants are choose by seeing their healthiness which means randomization is not present here while in Plan B all twenty four plants are taken and twelve are given X weed while other are given Y weed which means randomly plants are chosen.

Hence, Plan B is the correct way.

Unlock Step-by-Step Solutions & Ace Your Exams!

• Full Textbook Solutions

  Get detailed explanations and key concepts

• Unlimited Al creation

  Al flashcards, explanations, exams and more...

• Ads-free access

  To over 500 millions flashcards

• Money-back guarantee

  We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!