All categories

2 years ago

A math class's mean test score is 88.4. The standard deviation is 4.0. If Kimmie scored 85.9, what is her z-score

Mathematics

1 answer:

kvv77 [185]2 years ago

5 0

The z-score of Kimmie is -0.625

<h3>Calculating z-score</h3>

The formula for calculating the z-score is expressed as;

z = x-η/s

where

η is the mean

s is the standard deviation

x is the Kimmie score

Substitute the given parameter

z = 85.9-88.4/4.0

z = -2.5/4.0

z = -0.625

Hence the z-score of Kimmie is -0.625

Learn more on z-score here: brainly.com/question/25638875

#SPJ1

You might be interested in

There are 120 boys in Morris middle school. What is the total number

AnnZ [28]

Answer:

121

Step-by-step explanation:

trust me i got you wuth that 2016 throwback

8 0

2 years ago

Read 2 more answers

Graph the equation in a coordinate plane, x+2y=4

natta225 [31]

Hope this helps!

Stay safe, have a good day :D

4 0

3 years ago

Find the missing value in the percent statement using a proportion. ______ is 75% of 4.

zavuch27 [327]

Answer: 3

Step-by-step explanation: Hope I helped

3 0

2 years ago

What is the result when 75,069 is divided by 45

Lera25 [3.4K]

Answer: 1668.2

Multiply 1668.2×45 and get 75,069

5 0

3 years ago

Read 2 more answers

PLEASE SOLVE AND CHECK. SHOW COMPLETE SOLUTION

Alex17521 [72]

Solution:

$\sqrt{4x + 13} = x + 2$

First square both sides.

$= > ( \sqrt{4x + 13} ) ^{2} = (x + 2) ^{2}$

Now, square root and square gets cancel out in the LHS. And in the RHS, apply the identity: (a + b)² = a² + 2ab + b².

$= > 4x + 13 = {(x)}^{2} + 2 \times x \times 2 + (2) ^{2} \\ = > 4x + 13 = {x}^{2} + 4x + 4$

Now, transpose 4x and 4 to LHS.

$= > 4x - 4x + 13 - 4 = {x}^{2} \\$

Now, do the addition and subtraction.

$= > {x}^{2} = 9 \\ = > x = \sqrt{9} \\ = > x = ±3$

Answer:

x = ± 3

Hope you could understand.

If you have any query, feel free to ask.

3 0

2 years ago