A researcher is interested in the effects of diazepam on anxiety in rats. She takes a group of 15 female rats and injects them with 0.005 mg of diazepam for every 100 g the rats weigh, and takes a different group of female rats and injects them with saline. She then puts them all on an elevated-plus maze for 15 minutes and observes how long they spend (in seconds) in the enclosed arms versus the open arms. The less time they spend in the enclosed arms means they have less anxiety. She also weighs them before the injection to make sure she gets the dosage correct. a. Identify the population of interest b. Identify the Independent variable. c. Identify the Dependent variable. od for the indenendent variable? Explain why

A researcher is interested in the effects of diazepam on anxiety in rats. She takes a group of 15 female rats and injects them with 0.005 mg of diazepam for every 100 g the rats weigh, and takes a different group of female rats and injects them with saline. She then puts them all on an elevated-plus maze for 15 minutes and observes how long they spend (in seconds) in the enclosed arms versus the open arms. The less time they spend in the enclosed arms means they have less anxiety. She also weighs them before the injection to make sure she gets the dosage correct. a. Identify the population of interest b. Identify the Independent variable. c. Identify the Dependent variable. od for the indenendent variable? Explain why

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Description: A researcher is interested in the effects of diazepam on anxiety in rats. She takes agroup of 15 female rats and injects them with 0.005 mg of diazepam for every 100 gthe rats weigh, and takes a different group of female rats and injects them withsa

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 27PPS

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Concept explainers

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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Question

A researcher is interested in the effects of diazepam on anxiety in rats. She takes a
group of 15 female rats and injects them with 0.005 mg of diazepam for every 100 g
the rats weigh, and takes a different group of female rats and injects them with
saline. She then puts them all on an elevated-plus maze for 15 minutes and observes
how long they spend (in seconds) in the enclosed arms versus the open arms. The
less time they spend in the enclosed arms means they have less anxiety. She also
weighs them before the injection to make sure she gets the dosage correct.
a. Identify the population of interest
b. Identify the Independent variable.
c. Identify the Dependent variable.
d. What scale of measurement was used for the independent variable? Explain why
you think so.
e. Was the independent variable discrete or continuous? Explain why you think so.
f. What scale of measurement was used for the dependent variable? Explain why you
think so.
g. How could you change the dependent measurement into an ordinal scale?
h. What construct was used in the experiment?
i. What was the operational definition for the construct?

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