/*! 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} Q2-3BSC Discrete/ Continuous Data Which ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Q2-3BSC (page 1)

Discrete/ Continuous Data Which of the following describe discrete data?

a. The numbers of people surveyed in each of the next several years for the National Health and Nutrition Examination Surveys.

b. The exact foot lengths (measured in cm) of a random sample of statistics students.

c. The exact times that randomly selected drivers spend texting while driving during the past 7 days.

Short Answer

Expert verified
  1. The number of people surveyed is a type of discrete data.
  1. Foot lengths of a sample of students measured in cm are continuous data.
  1. In a random sample, the number of times drivers text while driving is a form of discrete data.

Step by step solution

01

Types of data based on countability

Numerical/quantitative data is classified into two types based on whether the random variable holds values that can be counted or not.

  • Discrete data:

A collection of values that are countableand fixed for a particular random variable is called discrete data. The values need not always be whole numbers.

For example, the shoe size of a man can take values in gaps of 0.5 like 7, 7.5, 8, etc., but it can never take a value of 7.82. Thus, it cannot change over time.

  • Continuous data:

A collection of values that arenot countable, fall in an interval, and can change over time is called continuous data. The values are usually in decimals and have a unit.

For example, the length of cloth, the speed of a train, the time taken in a race, etc.

02

Classification of data

  1. As the number of people surveyed can be counted, it is a discrete form of data.
  1. As foot lengths of a sample of students can be measured and have units, they are considered as continuous data.
  1. As the number of times that randomly selected drivers text while driving can only be counted and not measured, so it is continuous data.

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

Statistical Significance versus Practical Significance. When testing a new treatment, what is the difference between statistical significance and practical significance? Can a treatment have statistical significance but not practical significance?

In Exercises 29鈥�36, answer the given questions, which are related to percentages.

Chillax USA Today reported results from a Research Now for Keurig survey in which 1458 men and 1543 women were asked this: 鈥淚n a typical week, how often can you kick back and relax?鈥�

a. Among the women, 19% responded with 鈥渞arely, if ever.鈥� What is the exact value that is 19% of the number of women surveyed?

b. Could the result from part (a) be the actual number of women who responded with 鈥渞arely, if ever鈥�? Why or why not?

c. What is the actual number of women who responded with 鈥渞arely, if ever鈥�?

d. Among the men who responded, 219 responded with 鈥渞arely, if ever.鈥� What is the percentage of men who responded with 鈥渞arely, if ever.鈥�?

e. Consider the question that the subjects were asked. Is that question clear and unambiguous so that all respondents will interpret the question the same way? How might the survey be improved?

In Exercises 29鈥�36, answer the given questions, which are related to percentages.

Workplace Attire In a survey conducted by Opinion Research Corporation, 1000 adults were asked to identify 鈥渨hat is inappropriate in the workplace.鈥� Of the 1000 subjects, 70% said that miniskirts were not appropriate in the workplace.

a. What is 70% of 1000?

b. Among the 1000 respondents, 550 said that shorts are unacceptable in the workplace. What percentage of respondents said that shorts are unacceptable in the workplace?

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.)

Subject


12345
8 AM9798.597.697.798.7
12 AM97.697.89898.498.4

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?

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.

MCAT The Medical College Admissions Test (MCAT) is commonly used as part of the decision-making process for determining which students to accept into medical schools. To test the effectiveness of the Siena MCAT preparation course, 16 students take the MCAT test, then they complete the preparatory course, and then they retake the MCAT test, with the result that the average (mean) score for this group rises from 25 to 30. There is a 0.3% chance of getting those results by chance. Does the course appear to be effective?
See all solutions

Recommended explanations on Math Textbooks

Probability and Statistics

Read Explanation

Decision Maths

Read Explanation

Pure Maths

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Geometry

Read Explanation

Discrete Mathematics

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.