All categories

2 years ago

For a population with μ = 60 , X=81, and σ = 12. Find the z-score for 81.

Mathematics

1 answer:

zepelin [54]2 years ago

8 0

The z-score for 81 is 1.75

<h3>How to determine the z-score for 81?</h3>

The given parameters are:

μ = 60 , X=81, and σ = 12

The z scores is calculated using:

$z = \frac{x - \mu}{\sigma}$

Substitute the given values

$z = \frac{81 - 60}{12}$

Evaluate the difference

$z = \frac{21}{12}$

Simplify

z = 1.75

Hence, the z-score for 81 is 1.75

You might be interested in

Rate Problems:

Alla [95]

Define variable- 4.5x
Equation - 15+ 4.5x =42
Solution- x=6

15+ 4.5x =42
4.5x = 27
X=6

5 0

3 years ago

Read 2 more answers

Please need help in these 3 algebra questions !!!!

Marysya12 [62]

Answer:

$\large\boxed{7.\ B.\ 8s^2+16s+1}\\\\\boxed{8.\ D.\ -15t^9u^{11}}\\\\\boxed{11.\ C.\ 3,\ -2}$

Step-by-step explanation:

$7.\\(3s^2+7s+2)+(5s^2+9s-1)=3s^2+7s+2+5s^2+9s-1\\\\\text{combine like terms}\\\\=(3s^2+5s^2)+(7s+9s)+(2-1)\\\\=8s^2+16s+1$

$8.\\(-3t^2u^3)(5t^7u^8)=(-3\cdot5)(t^2t^7)(u^3u^8)\qquad\text{use}\ a^na^m=a^{n+m}\\\\=-15t^{2+7}u^{3+8}=-15t^9u^{11}$

$11.\\n-the\ number\\\\n^2=n+6\qquad\text{subtract}\ n\ \text{and}\ 6\ \text{from both sides}\\\\n^2-n-6=0\\\\n^2+2n-3n-6=0\\\\n(n+2)-3(n+2)=0\\\\(n+2)(n-3)=0\iff n+2=0\ \vee\ n-3=0\\\\n+2=0\qquad\text{subtract 2 from both sides}\\n=-2\\\\n-3=0\qquad\text{add 3 to both sides}\\n=3$

4 0

3 years ago

Tell me how to shade the area on the grid that shows 7/8x3/4

viva [34]

If the grid is an 8x8:

To solve this we need to convert 3/4 into a fraction x/8 so that they have the same denominator.

To do this we can set a porportion and find a common denominator. 4 x 2 = 8 so the common denominator would be 8 and the rule would be x 2 so 4 x 2 = 8 and 3 x 2 = 6

So we get 7/8 and 6/8

From top to bottom shade 7 spaces in a row

From left to right shade 6 spaces in a row

Fill in the spaces in between to make a square

I hope this helps!

8 0

3 years ago

Read 2 more answers

Pine Bluff Middle School is having its annual Spring Fling dance, which will cost $400. The student treasurer reported that the

Jet001 [13]

Is the real anwser 479

6 0

3 years ago

What is the amount of liquid a water bottle bottle holds??

harkovskaia [24]

If you look on the water bottle paper (It depends) you will find that it holds one of the amounts from 16.9<span> to 20 oz.

Hoped I helped!</span>

8 0

3 years ago