What is the z-score of X, if n = 72, $μ = 137$ $mu= 137$ , SD =25, and X =13?

Question

What is the z-score of X, if n = 72, $μ = 137$ $mu= 137$ , SD =25, and X =13?

1 Answer

Impact of this question

3400 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-03-04T05:14:19

z-score is $- 42.087$ $-42.087$

Explanation:

z-score of variable $x$ $x$ with mean $μ$ $mu$ , and standard deviation $σ$ $sigma$ is given by $\frac{x - μ}{\frac{σ}{\sqrt{n}}}$ $(x-mu)/(sigma/sqrtn)$

As $μ = 137$ $mu=137$ , $σ = 25$ $sigma=25$ , $n = 72$ $n=72$ and $x = 13$ $x=13$

z-score is $\frac{13 - 137}{\frac{25}{\sqrt{72}}} = \frac{(- 124) \cdot \sqrt{72}}{25} = - 42.087$ $(13-137)/(25/sqrt72)=((-124)*sqrt72)/25=-42.087$

Science

Math

Humanities

... and beyond

What is the z-score of X, if n = 72, $μ = 137$ $mu= 137$ , SD =25, and X =13?

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

What is the z-score of X, if n = 72, μ=137mu= 137, SD =25, and X =13?

1 Answer

Explanation:

Related questions

Impact of this question

What is the z-score of X, if n = 72, $μ = 137$ $mu= 137$ , SD =25, and X =13?