# 12th Grade Math: Standard Score Help

This page is for twelfth grade students who need help, and for teachers and tutors who are looking for resources on .

# 12th Grade Math: Standard Score

In statistics, a standard score is a dimensionless quantity derived by subtracting the population mean from an individual raw score and then dividing the difference by the population standard deviation. This conversion process is called standardizing or normalizing; however, "normalizing" can refer to many types of ratios.

Standard scores are also called z-values, z-scores, normal scores, and standardized variables; the use of "Z" is because the normal distribution is also known as the "Z distribution". They are most frequently used to compare a sample to a standard normal deviate (standard normal distribution, with μ=0 and σ=1), though they can be defined without assumptions of normality.

The standard score indicates how many standard deviations an observation is above or below the mean: the standard deviation is the unit of measurement of the z-score. It allows comparison of observations from different normal distributions, which is done frequently in research.

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At TuLyn, we have over 2000 math video tutorial clips including standard score videos, standard score practice word problems, standard score questions and answers, and standard score worksheets.

Our standard score videos replace text-based tutorials in 12th grade math books and give you better, step-by-step explanations of standard score. Watch each video repeatedly until you understand how to approach standard score problems and how to solve them.
• Tons of video tutorials on standard score make it easy for you to better understand the concept.
• Tons of word problems on standard score give you all the practice you need.
• Tons of printable worksheets on standard score let you practice what you have learned in your 12th grade math class by watching the video tutorials.
How to do better on standard score: TuLyn makes standard score easy for 12th grade math students.

# 12th Grade: Standard Score Word Problems

What is the critical z-value
What is the critical z-value that corresponds to a confidence level of 86%

standard score homework help word problems for 12th grade math students.

# How Others Use Our Site

I hope it will teach me the fundamentals for 11th grade and 12th grade Math.
I teach math to 9th grade -12th grade at a small city school in North Carolina. Knowing that each student in NC has to score levels 3 or 4 on the EOC Algebra 1 test to graduate, any real-life application type problems would be beneficial to the success of my students. Knowing also that matrces are heavily tested on the NC EOC test, this website appears that it would be helpful. Our textbooks do not offer many examples of matrices . Thank you.