Professionals of all types must make sense out of the huge amounts of data they collect on a daily basis. Researchers first try to impose some sort of order on their data by looking at the average values and the extent to which their numbers vary from day to day or month to month. Business owners face the challenge of making sure they have enough staff to accommodate customers while not having so many that it hurts their bottom line. Using the right descriptions of their data enables management to schedule workforces appropriately.
Languages: English
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Normal Distributions
As you have seen in earlier lessons, statisticians have visual and numerical ways of describing a set of data. Histograms are one of the most common ways to display numerical data. By looking at a histogram, we can easily see the mean and spread of the data. In this lesson, you will learn how the visual impression of a histogram is translated into curves that closely describe the data.
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Scatterplots & Correlation
Questions about the relationship between two variables are asked all the time. Will time spent in a certain rehab program really increase an addict’s chance of not relapsing? Will extra minutes spent training athletes result in better performance or increase fatigue and decrease performance? Is the increased carbon dioxide in the atmosphere really increasing the earth’s temperature? All these questions can be addressed by statistics and analyzed initially through a display called a scatterplot.
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The Digestive System, Nutrition & Metabolism
Every cell in the body needs nutrients to survive and do work. The nutrients come from food, which is physically and chemically broken down in the digestive system. After the food is digested, the nutrients pass into the bloodstream and supply the body’s cells with the nutrients they need.
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The Urinary System
Our bodies take nutrients from food and use them to maintain all bodily functions. After the body uses what it needs from the food and drink, waste products from digestion and cellular metabolism need to be eliminated. The urinary system works with the respiratory system, integumentary system, and digestive system to excrete wastes and keep electrolytes and water in the body balanced.
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The Reproductive Systems
While individuals don’t need to reproduce to survive, reproduction is essential to continue the human species. Like any other living organism, humans seek to procreate, and for some, there may be no greater affirmation than the birth of their offspring. In order to procreate naturally, both the male and the female reproductive systems must be functioning normally. If they are not, however, medical intervention may help a couple to conceive.
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Statistically Speaking Box Set (32 Lessons on 3 DVDs)
Thirty-two video lessons are uniquely embedded in a special edition of W.H. Freeman’s StatsPortal. Instructors select from two textbook options, and students purchase an eBook/StatsPORTAL token.
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Introduction to Statistics
We are bombarded with statistics every day. But what do all these numbers mean and who really uses them? This lesson introduces you to the many uses of statistics in the real world of science and industry. You will meet and hear the stories of how people utilize statistics to better understand the world around them. Their stories bring the field of statistics into focus.
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The Cardiovascular System
Throughout our lives, we are continually consuming oxygen. Our bodies need oxygen to produce adenosine triphosphate (ATP), which provides the cell the ability to do work. We take in oxygen through our lungs, but it is the cardiovascular system that delivers that oxygen to all the cells in our bodies. Each day, the heart pumps about 7,500 liters of blood through a network of blood vessels. That network of blood vessels, along with the heart and the blood itself, combine to make up the cardiovascular system. The cardiovascular system is responsible for the transport of nutrients, hormones, gases, and wastes to and from the cells in the body. It also plays a critical role in thermal regulation. Keeping the cardiovascular system functioning well is critical to maintain good health; the lifestyle choices that we make can have a huge impact on our cardiovascular condition.
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Blood, the Lymphatic System & Immunity
Blood is the fluid of life-all of our systems depend on the transportation of oxygen, hormones, nutrients, and wastes. Blood transports oxygen from the lungs to body tissues and carbon dioxide from body tissues to the lungs. Blood carries nourishment from the digestive system and hormones from glands throughout the body. It transports disease-fighting substances to the tissues and waste to the kidneys and lungs. The lymphatic system distributes immune cells and other factors throughout the body. It also interacts with the blood and the cardiovascular system to drain fluid from cells and tissues. The lymphatic system contains immune cells that protect the body against foreign invaders.