There is a large tree, growing in the middle of the lawn. You notice that there are lots of daisies in the lawn, but none under the tree. Suggest two hypotheses, to explain why there are no daisies under the tree. Choose one of your hypotheses, and make a prediction from it, which can be tested by an experiment. Describe an experiment, which could be done, to find out if the prediction is correct.

What is significance good for? Which of the following questions does a test of significance answer? Briefly explain your replies. (a)Is the sample or experiment properly designed? (b)Is the observed effect due to chance? (c)Is the observed effect important?

(a)Is the sample or experiment properly designed?

(b)Is the observed effect due to chance?

(c)Is the observed effect important?

When doing an experiment, the experimenter wants increase the chances that subjects' characteristics, that could bias the results of the experiment, and reduce the validity of the findings, are equally distributed across the treatment groups. Which of the following procedures would the experimenter utilize to accomplish this purpose?

a) random assignment b) systematic assignment c) reliable assignment d) all of the above

First, offer what you take to be the best argument(s) on behalf of Dr. Milgram and Dr. Zimbardo in defense of their decisions to run their respective psychological studies. Next, analyze the argument(s). Are they sound? Why or why not? Ultimately, do you think that the Milgram Experiment and the Stanford Prison Experiment were morally permissible? Why or why not?

What’s the design?Read the brief report of statistical research below, and a) explain why it is an experiment rather than an observational study. Is obesity related to stress?Some mice were subjected to stress and then fed either a standard diet or a high-fat diet. A group of non-stressed mice were also fed a standard or high-fat diet.The weights were recorded for all the mice, before and after the study.Also, identify:

b)the factor(s) in the experiment and the number of levels for each.

c)the number of treatments.

d)the response variable(s) measured.

e)whether it was blind (or double-blind)f)the nature and scope of the conclusion the experiment can reach.

In the first part of this lab, you will find the coefficient of static friction between paper and a book so we want the surface of the ramp to be paper. This can be done either by making your ramp out of paper (by using a notebook) or by taping a piece of paper to the surface of a ramp.

Conduct your experiment. You should perform at least three trials. Create a data table that includes all of the data taken in your experiment and the coefficient of static friction found from each trial. Find the average value of the coefficient of static friction between the paper and your book.

What type of data do I need to record when performing this experiment?

What’s the design? Read the brief report of statistical research below, and
a) explain why it is an experiment rather than an observational study.

Is obesity related to stress?
Some mice were subjected to stress and then fed either a standard diet or a high-fat diet.
A group of non-stressed mice were also fed a standard or high-fat diet.
The weights were recorded for all the mice, before and after the study.

Also, identify:
b) the factor(s) in the experiment and the number of levels for each.
c) the number of treatments.
d) the response variable(s) measured.
e) whether it was blind (or double-blind)
f)the nature and scope of the conclusion the experiment can reach.

An experiment is conducted to determine the effects of four different nitrogen levels (0, 20, 40 and 60 pounds per acre) on three different varieties of oats (Golden, Marvellous and Victory). There are six pieces of land (of equal fertility) available for planting. Each piece of land is divided into three plots, and an oat variety is randomly assigned to one of the plots. Each of the plots is then divided into four subplots, and a level of nitrogen is randomly assigned to the subplot. The response variable is the yield of the oats in quarter pounds per subplot.

1. Write the appropriate model for the analysis of this experiment.

Now suppose the six pieces of land are not necessarily equal in fertility.

2. Write the appropriate model for the analysis of this experiment.

An experiment is conducted to determine the effects of four different nitrogen levels (0, 20, 40 and 60 pounds per acre) on three different varieties of oats (Golden, Marvellous and Victory). There are six pieces of land (of equal fertility) available for planting. Each piece of land is divided into three plots, and an oat variety is randomly assigned to one of the plots. Each of the plots is then divided into four subplots, and a level of nitrogen is randomly assigned to the subplot. The response variable is the yield of the oats in quarter pounds per subplot.

1. Write the appropriate model for the analysis of this experiment.

Now suppose the six pieces of land are not necessarily equal in fertility.

2. Write the appropriate model for the analysis of this experiment.