Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

A farmer is experimenting to determine which variety of apple trees, Fuji or Gala, will produce more fruit in his orchard. The orchard is divided into 20equally sized square plots. He has 10trees of each variety and randomly assigns each tree to a separate plot in the orchard. What is the experimental unit (s) in this study? a. The trees; b. The farmer; c. The plots d. The orchard e. The apples

Short Answer

Expert verified

The correct option is (c) The plots

Step by step solution

01

Given information

We have been given that the orchard is divided into 20equally sized square plots.

He has 10trees of each variety and randomly assigns each tree to a separate plot in the orchard.

02

Step 2:Explanation 

The plots are the test units, as they are the objects subjected to the estimations. The assortment of apple trees is the informative variable since they advance alteration within the exploratory unit through two diverse medicines (Fuji or Occasion assortment). The agriculturist is the one conducting the trial, and the number of apples is the result to be analyzed. The plantation as a whole does not meddle with the test since each plot is being examined.

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.

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

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Supplements for testosterone -As men age, their testosterone levels gradually decrease. This may cause a reduction in energy, an increase in fat, and other undesirable changes. Do testosterone supplements reverse some of these effects? A study in the Netherlands assigned 237men aged 60to 80 with low or low-normal testosterone levels to either a testosterone supplement or a placebo.

Explain why it was necessary to include a control group in this experiment.

You wonder if TV ads are more effective when they are longer or repeated more often

or both. So you design an experiment. You prepare 30-second and 60-second ads for a

camera. Your subjects all watch the same TV program, but you assign them at random

to four groups. One group sees the 30-second ad once during the program; another sees

it three times; the third group sees the 60-second ad once; and the last group sees the

60-second ad three times. You ask all subjects how likely they are to buy the camera.

Which of the following best describes the design of this experiment?

a. This is a randomized block design, but not a matched pairs design.

b. This is a matched pairs design.

c. This is a completely randomized design with one explanatory variable (factor).

d. This is a completely randomized design with two explanatory variables (factors).

e. This is a completely randomized design with four explanatory variables (factors).

One of the better studies of the effect of regular attendance

at religious services gathered data from a random sample of 3617 adults. The researchers then measured lots of variables, not just the explanatory variable (religious activities) and the response variable (length of life). A news article said: โ€œChurchgoers were more likely to be nonsmokers, physically active, and at their right weight. But even after health behaviors were taken into account, those not attending religious services regularly still were significantly more likely to have died.โ€ What conclusion can we draw from this study? Explain your reasoning.

Sampling gravestones The local genealogical society in Coles County, Illinois, has compiled records on all 55,194gravestones in cemeteries in the county for the years 1825to 1985. Historians plan to use these records to learn about African Americans in Coles Countyโ€™s history. They first choose an SRS of 395records to check their accuracy by visiting the actual gravestones.

a. Explain how you would use a random number generator to choose the SRS. Your description should be clear enough for a classmate to carry out your plan.

b. Use your method from part (a) to choose the first 3gravestones

Tweet, tweet! What proportion of students at your school use Twitter? To find out, you survey a simple random sample of students from the school roster.

a. Will your sample result be exactly the same as the true population proportion? Explain your answer.

b. Which would be more likely to produce a sample result closer to the true population value: an SRS of 50students or an SRS of 100students? Explain your answer.

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free