Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 1: Q 1.4. (page 7)

Explain two ways in which descriptive statistics and inferential statistics are interrelated.

Short Answer

Expert verified
  • Before performing an inferential analysis, it is nearly always necessary to utilize descriptive statistics techniques to arrange and summarise the data acquired from a sample.
  • A preliminary descriptive examination of a sample generally shows elements that lead to the selection of a suitable inferential method.

Step by step solution

01

Step 1. Given information.

The given statement is:

Explain two ways in which descriptive statistics and inferential statistics are interrelated.

02

Step 2. Interrelation between descriptive statistics and inferential statistics.

The two ways in which descriptive statistics and inferential statistics are interrelated are:

  • Before carrying out an inferential analysis one must almost always use the techniques of descriptive statistics so that the data which is obtained from a sample, can be organized and summarized.
  • The preliminary descriptive study of a sample typically reveals characteristics that lead to the selection of a suitable inferential method.

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!

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

The members of a population are numbered 1-5.

(a) List the 10 possible samples (without replacement) of size 3 from this population.

(b) SRS of size 3 is taken from the population, what are the chances of selecting 1, 3, and 5? Explain your answer.

(c) Use Table I in Appendix A to obtain an SRS of size 3 from the population. Start at the single-digit number in line number 5 and column number 20, read down the column, up the next, and so on.

What are the two major types of statistics? Describe them in detail.

In Exercises 1.17-1.22, state whether the investigation in question is an observational study or a designed experiment. Justify your answer in each case.

Sex, Sleep, and PTSD. In the article, "One's Sex, Sleep, and Posttraumatic Stress Disorder" (Biology of Sex Differences, Vol. 3, No. 29, pp. 1-7), I. Kobayashi et al. study the relationship between one's sex, sleep patterns, and posttraumatic stress disorder (PTSD) after trauma exposure. The authors report that women have a higher lifetime prevalence of PTSD as well as a greater risk of developing PTSD following trauma exposure. Relationships between sleep and physical health have been documented in a number of studies, and the authors explore the possibility that disruptive sleep habits are common among people with PTSD and also a possible risk factor for the development of PTSD. A questionnaire of men and women with and without PTSD produced data on their sleep habits.

Comparing Gas Mileages. An experiment is to be conducted to compare four different brands of gasoline for gas mileage.

(a) Suppose that you randomly divide 24 cars into four groups of 6 cars each and then randomly assign the four groups to the four brands of gasoline, one group per brand. Is this experimental design a completely randomized design or a randomized block design? If it is the latter, what are the blocks?

(b) Suppose, instead, that you use six different models of cars whose varying characteristics (e.g., weight and horsepower) affect gas mileage. Four cars of each model are randomly assigned to the four different brands of gasoline. Is this experimental design a completely randomized design or a randomized block design? If it is the latter, what are the blocks?

(c) Which design is better, the one in part (a) or the one in part (b)? Explain your answer.

Explain why a census is often not the best way to obtain information about a population.
See all solutions

Recommended explanations on Math Textbooks

Calculus

Read Explanation

Pure Maths

Read Explanation

Statistics

Read Explanation

Discrete Mathematics

Read Explanation

Geometry

Read Explanation

Theoretical and Mathematical Physics

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.

Sign-up for free