Determine z-scores and percentiles, Mathematics

Assignment Help:

Q. Determine Z-scores and Percentiles?

Ans.

Z-scores help measure how far a piece of data is from the mean. More specifically, Z-scores tell how far a piece of data is from the mean in terms of standard deviations. For example, if a data set has a mean of 30 and a standard deviation of 5, then a data value of 45 has a z-score of 3 because it is three standard deviations above the mean. Similarly, a data value of 20 has a z-score of 2 because it is two standard deviations below the mean.

The z-score of any number x in a normal distribution is given by

599_Determine Z-scores and Percentiles.gif


where x is the score, is the mean and is the standard deviation.

1839_Determine Z-scores and Percentiles1.gif


Related Discussions:- Determine z-scores and percentiles

Differentiation, Need Solution Find (dy)/( dx) for; (i). y = x 7 ...

Need Solution Find (dy)/( dx) for; (i). y = x 7 (ii). y = x 2γ (iii). y = x -3 (iv). y = x

Limits at infinity part ii, Limits At Infinity, Part II :  In this sectio...

Limits At Infinity, Part II :  In this section we desire to take a look at some other kinds of functions that frequently show up in limits at infinity.  The functions we'll be di

Sequence and series, Find the sum og series 1+(1+3)+(1+3+5)+.......+(1+3+.....

Find the sum og series 1+(1+3)+(1+3+5)+.......+(1+3+...+15+17)=

Determine the exterior angle, Using the sketch below and the fact that ∠A +...

Using the sketch below and the fact that ∠A + ∠B + ∠C + ∠D = 325, Determine m∠E.   a. 81° b. 35° c. 25° d. 75° b. The addition of the measures of the exterio

Determine multiplications required to obtain the determinant, Don't count t...

Don't count the number of divisions. Do not use asymptotic notation, instead provide exact answers. (i) What is the maximum number of multiplications required to solve a system

Naming fractions greater than 1, the 10 miles assigned to the chess club st...

the 10 miles assigned to the chess club start at the 10 mile point and go to the 20 mile point when the chess club members have cleaned 5/8 of their 10 mile section between which m

Example of integration strategy - integration techniques, Evaluate the subs...

Evaluate the subsequent integral. ∫ (tan x/sec 4 x / sec 4 x)  dx Solution This kind of integral approximately falls into the form given in 3c.  It is a quotient of ta

Find their present ages of son and father, When the son will be as old as t...

When the son will be as old as the father today their ages will add up to 126 years. When the father was old as the son is today, their ages add upto 38 years.  Find their present

Metric Units, How do I convert metric units?

How do I convert metric units?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd