/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q29BB In Exercises 29鈥�32, indicate w... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Q29BB (page 1)

In Exercises 29鈥�32, indicate whether the observational study used is cross-sectional, retrospective, or prospective.

Nurses鈥� Health Study II Phase II of the Nurses鈥� Health Study was started in 1989 with 116,000 female registered nurses. The study is ongoing.

Short Answer

Expert verified

This is a prospective type of observational study.

Step by step solution

01

Given information

The observational study, which began in 1989 for phase II, comprises 116,000 registered female nurses.

The number of nurses is still being recorded.

02

Different forms of observational studies

A cross-sectional study is a study that is based on a single point in time. Values are recorded for a particular time.

A retrospective study is a study that is based on some point in time in the past. Values are recorded for a past period.

A prospective study is a study that is based on the current time-point and also continues in the future. Values are recorded over a long period.

03

Identification of the type of study

This study requires recording the number of registered nurses in the future as well. As the number of registered nurses is still being recorded, the observational study is prospective.

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 91影视!

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

In Exercises 21鈥�28, determine whether the study is an experiment or an observational study, and then identify a major problem with the study.

Atkins Weight Loss Program An independent researcher tested the effectiveness of the Atkins weight loss program by randomly selecting 1000 subjects using that program. Each of the subjects was called to report their weight before the diet and after the diet.

Statistical Significance and Practical Significance. In Exercises 13鈥�16, determine whether the results appear to have statistical significance, and also determine whether the results appear to have practical significance.

Gender Selection In a study of the Gender Aide method of gender selection used to increase the likelihood of a baby being born a girl, 2000 users of the method gave birth to 980 boys and 1020 girls. There is about a 19% chance of getting that many girls if the method had no effect.

Colleges in United States Currently, there are 4612 colleges in the United States, and the number of full-time students is 13,203,477.

a. Are the numbers of full-time students at different colleges discrete or continuous?

b. What is the level of measurement for the numbers of full-time students at colleges? (nominal, ordinal, interval, ratio)

c. What is wrong with surveying college students by mailing questionnaires to 10,000 of them who are randomly selected?

d. If we randomly select 50 full-time college students in each of the 50 states, what type of sample is obtained? (random, systematic, convenience, stratified, cluster)

e. If we randomly select four colleges and survey all of their full-time students, what type of sample is obtained? (random, systematic, convenience, stratified, cluster)

What鈥檚 Wrong? In Exercises 25鈥�28, identify what is wrong.

Motorcycles and Sour Cream: In recent years, there has been a strong correlation between per capita consumption of sour cream and the numbers of motorcycle riders killed in noncollision accidents. Therefore, consumption of sour cream causes motorcycle fatalities.

In Exercises 17鈥�20, refer to the sample of body temperatures (degrees Fahrenheit) in the table below. (The body temperatures are from a data set in Appendix B.)

Source: The listed body temperatures were obtained from Dr. Steven Wasserman, Dr. Philip Mackowiak, and Dr. Myron Levine, who were researchers at the University of Maryland. Is the source of the data likely to be biased?
See all solutions

Recommended explanations on Math Textbooks

Probability and Statistics

Read Explanation

Mechanics Maths

Read Explanation

Logic and Functions

Read Explanation

Pure Maths

Read Explanation

Applied Mathematics

Read Explanation

Geometry

Read Explanation
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.