Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

z Scores and Area Under the Curve01:17

z Scores and Area Under the Curve

20.1K
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...
20.1K
z Scores and Unusual Values01:07

z Scores and Unusual Values

11.7K
The z score is one of the three measures of relative standing. It describes the location of a value in a dataset relative to the mean. z scores are obtained after the standardization of the values in a dataset. The z score for the mean is 0.
 This score indicates how far a value is from the mean in terms of standard deviation. For example, if a data value has a z score of +1, the researcher can infer that the particular data value is one standard deviation above the mean. If another data...
11.7K
Introduction to z Scores01:05

Introduction to z Scores

1.5K
A z score (or standardized value) is measured in units of the standard deviation. It indicates 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 zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one.
z scores...
1.5K
Introduction to z Scores01:06

Introduction to z Scores

11.7K
A z score (or standardized value) is measured in units of the standard deviation. It 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 zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one.
z scores...
11.7K
Angular Velocity and Displacement01:08

Angular Velocity and Displacement

23.6K
Uniform circular motion is motion in a circle at a constant speed. Although this is the simplest case of rotational motion, it is very useful for many situations and is used to introduce rotational variables. When a particle is moving in a circle, the coordinate system is fixed and serves as a frame of reference to define the particle’s position. Its position vector from the origin of the circle to the particle sweeps out the angle θ, which increases in the counterclockwise direction...
23.6K
Midrange01:07

Midrange

4.5K
A somewhat easy to compute quantitative estimate of a data set’s central tendency is its midrange, which is defined as the mean of the minimum and maximum values of an ordered data set.
Simply put, the midrange is half of the data set’s range. Similar to the mean, the midrange is sensitive to the extreme values and hence the prospective outliers. However, unlike the mean, the midrange is not sensitive to all the values of the data set that lie in the middle. Thus, it is prone to...
4.5K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Benzyl isothiocyanate suppresses development and metastasis of murine mammary carcinoma by regulating the Wnt/β‑catenin pathway.

Molecular medicine reports·2019
Same author

A Novel DT40 Antibody Library for the Generation of Monoclonal Antibodies.

Virologica Sinica·2019
Same author

Pre-pregnancy maternal fasting plasma glucose levels in relation to time to pregnancy among the couples attempting first pregnancy.

Human reproduction (Oxford, England)·2019
Same author

Fast and accurate decoding of Raman spectra-encoded suspension arrays using deep learning.

The Analyst·2019
Same author

Pharmacokinetic and exposure-response analysis of pertuzumab in patients with HER2-positive metastatic gastric or gastroesophageal junction cancer.

Cancer chemotherapy and pharmacology·2019
Same author

Identification of diagnostic long non‑coding RNA biomarkers in patients with hepatocellular carcinoma.

Molecular medicine reports·2019

Related Experiment Video

Updated: Mar 20, 2026

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

18.5K

Z-Score Reference Ranges for Angular M-Mode Displacement at 22-40 Weeks' Gestation.

Yan-Kai Mao1, Bo-Wen Zhao, Bei Wang

  • 1Department of Diagnostic Ultrasound and Echocardiography, Sir Run Run Shaw Hospital, Zhejiang University College of Medicine, Hangzhou, PR China.

Fetal Diagnosis and Therapy
|June 4, 2016
PubMed
Summary

New Z-score reference ranges for fetal mitral and tricuspid annular plane systolic excursions (MAPSE and TAPSE) were established using angular and conventional M-mode. These provide a quantitative tool for assessing fetal cardiac function.

More Related Videos

Author Spotlight: Unveiling Prognostic Indicators in Heart Failure - The Role of Phase Angle and Bioelectrical Impedance Analysis
04:05

Author Spotlight: Unveiling Prognostic Indicators in Heart Failure - The Role of Phase Angle and Bioelectrical Impedance Analysis

Published on: June 30, 2023

3.0K
Sagittal Plane Kinematic Gait Analysis in C57BL/6 Mice Subjected to MOG35-55 Induced Experimental Autoimmune Encephalomyelitis
13:02

Sagittal Plane Kinematic Gait Analysis in C57BL/6 Mice Subjected to MOG35-55 Induced Experimental Autoimmune Encephalomyelitis

Published on: November 4, 2017

9.4K

Related Experiment Videos

Last Updated: Mar 20, 2026

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

18.5K
Author Spotlight: Unveiling Prognostic Indicators in Heart Failure - The Role of Phase Angle and Bioelectrical Impedance Analysis
04:05

Author Spotlight: Unveiling Prognostic Indicators in Heart Failure - The Role of Phase Angle and Bioelectrical Impedance Analysis

Published on: June 30, 2023

3.0K
Sagittal Plane Kinematic Gait Analysis in C57BL/6 Mice Subjected to MOG35-55 Induced Experimental Autoimmune Encephalomyelitis
13:02

Sagittal Plane Kinematic Gait Analysis in C57BL/6 Mice Subjected to MOG35-55 Induced Experimental Autoimmune Encephalomyelitis

Published on: November 4, 2017

9.4K

Area of Science:

  • Cardiology
  • Fetal Medicine
  • Medical Imaging

Background:

  • Fetal cardiac function assessment is crucial for diagnosing congenital heart defects.
  • Quantitative measures like mitral and tricuspid annular plane systolic excursions (MAPSE and TAPSE) are valuable.
  • Establishing normative data is essential for accurate interpretation.

Purpose of the Study:

  • To create Z-score reference ranges for fetal MAPSE and TAPSE.
  • To compare measurements obtained by angular M-mode (AM) and conventional M-mode (CM).
  • To correlate these measurements with gestational age (GA) and heart area (HA).

Main Methods:

  • Prospective cross-sectional study of 261 normal singleton fetuses (22-40 weeks' gestation).
  • Measurements of TAPSE and MAPSE performed using both AM and CM.
  • Regression analyses used to establish reference ranges against GA and HA.

Main Results:

  • TAPSE and MAPSE positively correlated with GA and HA.
  • Cubic and linear regression models were developed for mean values based on HA and GA, respectively.
  • Z-scores and 95% reference intervals were generated; AM and CM showed strong correlation, with CM underestimating AM.

Conclusions:

  • Provided normal data and Z-scores for fetal MAPSE and TAPSE against GA and HA.
  • These reference ranges facilitate quantitative assessment of fetal cardiac dysfunction.
  • Useful in managing intrauterine growth restriction and other conditions affecting fetal heart function.