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Related Concept Videos

Normal Distribution01:11

Normal Distribution

The normal, a continuous distribution, is the most important of all the distributions. Its graph is a bell-shaped symmetrical curve, which is observed in almost all disciplines. Some of these include psychology, business, economics, the sciences, nursing, and, of course, mathematics. Some instructors may use the normal distribution to help determine students’ grades. Most IQ scores are normally distributed. Often real-estate prices fit a normal distribution. The normal distribution is extremely...
z Scores and Area Under the Curve01:17

z Scores and Area Under the Curve

z scores are the standardized values obtained after converting a normal distribution into a standard normal distribution. A z score is measured in units of the standard deviation. The z score tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a z score of zero.
Applications of Normal Distribution01:22

Applications of Normal Distribution

The normal distribution is a useful statistical tool. One of its practical applications is determining the door height after considering the normal distribution of heights of persons, such that many can pass through it easily without striking their heads. The normal distribution can also determine the probability of a person having a height less than a specific height.
The heights of 15 to 18-year-old males from Chile from 1984 to 1985 followed a normal distribution. The mean height is 172.36...
Regression Toward the Mean01:52

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...
Introduction to Normal Distributions01:29

Introduction to Normal Distributions

Standardized test scores often follow a symmetric distribution that can be modeled with the normal distribution, a fundamental concept in statistics. This distribution is particularly useful for interpreting test performance fairly across populations, as it provides a mathematical framework for understanding variability and central tendency in large datasets.From Histogram to Frequency DistributionRaw test data are often displayed using histograms, where the height of each bar represents the...
Central Limit Theorem01:14

Central Limit Theorem

The central limit theorem, abbreviated as clt, is one of the most powerful and useful ideas in all of statistics. The central limit theorem for sample means says that if you repeatedly draw samples of a given size and calculate their means, and create a histogram of those means, then the resulting histogram will tend to have an approximate normal bell shape. In other words, as sample sizes increase, the distribution of means follows the normal distribution more closely.
The sample size, n, that...

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Sharing the value of normal birth.

Judith A Lothian1

  • 1J udith L othian is a childbirth educator in Brooklyn, New York, and the Chair of the Lamaze International Certification Council. She is also an associate professor in the College of Nursing at Seton Hall University in South Orange, New Jersey, and a regular columnist for The Journal of Perinatal Education.

The Journal of Perinatal Education
|February 3, 2007
PubMed
Summary

This special issue presents evidence-based practices for supporting normal birth. It highlights six key care practices recommended by Lamaze International to promote, protect, and support physiological childbirth.

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Area of Science:

  • Perinatal Education
  • Obstetrics
  • Midwifery

Background:

  • A special issue of the Journal of Perinatal Education is introduced.
  • It features a position paper and six care practice papers from Lamaze International.
  • These papers are accompanied by expert commentary.

Purpose of the Study:

  • To present evidence supporting key care practices in childbirth.
  • To promote, protect, and support normal, physiological birth.
  • To disseminate research and recommendations from Lamaze International.

Main Methods:

  • Compilation of a position paper and six care practice papers.
  • Reprinting of papers with permission from Lamaze International.
  • Inclusion of accompanying commentary for each paper.

Main Results:

  • The collection provides evidence for six essential care practices.
  • These practices are designed to facilitate normal birth outcomes.
  • The papers collectively advocate for a standardized approach to supporting natural childbirth.

Conclusions:

  • The presented care practices are crucial for promoting normal birth.
  • Evidence supports the efficacy of these practices in protecting physiological childbirth.
  • This special issue serves as a resource for healthcare providers and educators in perinatal care.