$\begin{gathered} z-score=\frac{(x-\mu)}{\sigma}_{} \\ \mu=\operatorname{mean} \\ \sigma=s\tan dard\text{ deviation} \\ x=\text{score} \end{gathered}$

Step 2: Substitute the given parameters in the formula

$\begin{gathered} z-\text{score}=\frac{145-165}{40} \\ Z=-\frac{20}{40} \\ Z=-\frac{1}{2} \\ Z=-0.5 \end{gathered}$

Hence, the z-score of a person who scored 145 on the exam is -0.5

8 0

2 years ago

A number decreased by 23 is 44. Find the number.

Irina-Kira [14]

A) can.
because the number (x) has been decreased by 23 and is now 44.

Hope this helps :)

4 0

3 years ago

Read 2 more answers

Is the inequality always, sometimes, or never true?<br> 3x - 14 < 3(x-5)

lys-0071 [83]

Answer:

3x - 14 < 3x - 15

-14 < -15

never true

Step-by-step explanation:

8 0

4 years ago