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Chapter 1: Q2-13BSC (page 1)

Determine whether the data are from discrete data or continuous data set.

Freshman 15In a study of weight gains by college students in their freshman year, researchers record the amounts of weight gained by randomly selected students.

Short Answer

Expert verified

The amount of weight gained by a certain number of students is recorded as a continuous form of data.

Step by step solution

01

Given information

The amount of weight gained by a random sample of students is recorded.

02

Discrete and continuous data

  • Discrete data:

A dataset that contains values that can be listed and counted is called a discrete dataset. For example, the number of gadgets in a household, the number of questions answered correctly in a multiple-choice based test, etc.

  • Continuous data:

A dataset that contains values that can be measured and not counted is called a continuous dataset. For example, the number of hours it takes to finish a given work, the blood pressure of an individual, etc.

03

Classification of data as discrete or continuous

The Freshman 15 dataset records the amount of weight gained by newly enrolled students in their freshman year (first year of college). As weight gain can be measured and has units, thus it comes from acontinuous data set.

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Most popular questions from this chapter

Question: Determine whether the given source has the potential to create a bias in a statistical study.

Chocolate: An article in the Journal of Nutrition (Vol. 130, No. 8) noted that chocolate is rich in flavonoids. The article notes 鈥渞egular consumption of foods rich in flavonoids may reduce the risk of coronary heart disease.鈥� The study received funding from Mars, Inc., the candy company, and the Chocolate Manufacturers Association.

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.

Determine whether the data are from discrete data or continuous data set.

House AttendanceThe Clerk of the U.S. House of Representatives records the number of representatives present at each session.

Determine whether the data are from discrete data or continuous data set.

Criminal ForensicsWhen studying the relationship between lengths of feet and heights so that footprint evidence at a crime scene can be used to estimate the height of the suspect, a researcher records the exact lengths of feet from a large sample of random subjects.

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

Conclusion If we analyze the listed body temperatures with suitable methods of statistics, we conclude that when the differences are found between the 8 AM body temperatures and the 12 AM body temperatures, there is a 64% chance that the differences can be explained by random results obtained from populations that have the same 8 AM and 12 AM body temperatures. What should we conclude about the statistical significance of those differences?
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