1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
emmainna [20.7K]
1 year ago
6

On a standardized exam, the scores are normally distributed with a mean of 165 and astandard deviation of 40. Find the z-score o

f a person who scored 145 on the exam.
Mathematics
1 answer:
vladimir1956 [14]1 year ago
8 0

The Z-score is calculated by the formula below

\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

You might be interested in
Question 3(Multiple Choice Worth 5 points)
Zanzabum

Answer:

0.3

Step-by-step explanation:

just divide on a calculator 3/9 and u get 0.3

4 0
3 years ago
Really need big help on this one please
Valentin [98]

Answer:

Answer equals to 55.75ftsquare

Step-by-step explanation:

7 0
2 years ago
TEXT ANSWER
Murljashka [212]
Okay, you ordered $23.91 worth of food and $9.27 worth of drinks. Add them and you get $33.18. Since the sales tax rate is 6%, this means that it is $1.99. Adding the tax to your meal would leave a total cost of $35.18. Have a great day!
4 0
2 years ago
Read 2 more answers
...!!.!.!.!.!.!.!.!.!.!.!.!.
Schach [20]

Answer: It is proportional because 195/3 equals 65 and 325/5 equals 65 as well, so it is proportional.

Hope this helps! :)

5 0
3 years ago
Read 2 more answers
A lion’s heart beats 12 times in 16 seconds.how many heartbeats will it have in 60 seconds?
Sergio [31]
Hey there!

Here is your answer:

<u><em>The proper answer to this question is "44 times".</em></u>

Reason:

You have to solve it this way:

<u><em>12 heartbeats=16 seconds</em></u>

<u><em>16+16=32</em></u>
<u><em>36+16=48</em></u>
<u><em>48+16=64</em></u>
<u><em>16-12=4</em></u>
<u><em>12+12=36+8=44</em></u>

<em>Therefore lions heart beats 44 times every 60 seconds.</em>

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit
6 0
3 years ago
Other questions:
  • 531 x 7 using distributive property
    8·2 answers
  • Find two consecutive off integers such that their product os 35 more than 8 times their sum
    13·1 answer
  • Can someone help me with this equation a+2/2=-1
    5·2 answers
  • Please help me with this<br>what is x?
    5·1 answer
  • (a+2)(a-1) - (a+1)(a-2), if a = 2​
    9·1 answer
  • I need help ASAP!!Please explain how to do the problem
    15·1 answer
  • Any two points in space lie on one and only one _____.
    13·1 answer
  • In austin texas, 8 bats ate 40 grams of insects in one night. At this rate how many grams of insects could 64 bats eat in 1 nigh
    14·2 answers
  • The value of a sculpture is increasing 5% every month. The original value of the sculpture is $6400. Identify the exponential gr
    11·1 answer
  • X/8 =.42 solve for X
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!