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
posledela
4 years ago
10

When Lorenzo finished his exam last week, he thought the test was over. But the instructor put z-scores on each student's paper

and asked them to figure out their original score. The mean for the class is µ = 61 and standard deviation is σ = 8. Lorenzo's z-score is +1.75. What did he score on the exam?
Mathematics
1 answer:
Anarel [89]4 years ago
5 0

Answer:

Lorenzo's score on exam was 75.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 61

Standard Deviation, σ = 8

We are given that the distribution of test score is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

z-score = 1.75

We have to find the value of x.

Putting values, we get

1.75 = \dfrac{x - 61}{8}\\\\x = 1.75(8) + 61\\x = 75

Thus, Lorenzo's score on exam was 75.

You might be interested in
The box plots show students' scores on a pre-test and a post-test.
ollegr [7]
Answer: 12

According to the box plot, the medians are marked in the middle (those middle lines).  Find the difference by subtracting 84 - 73 = 12 

Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia 
8 0
3 years ago
Read 2 more answers
There are 13 animals in the barn. Some are chickens and some are pigs . there are 40 legs in all. How many of each animal are th
Paha777 [63]
There are 7 pigs and 6 chicken
7 0
4 years ago
Claudia skis are 150 centimeters long. How Many millimeters is this
sergejj [24]

Answer:

1500 millimeters

Step-by-step explanation:

8 0
3 years ago
dane used a ruler and a protractor to draw a rhombus with a side of 4 cm inlength and an angle that measures 110 degrees choose
lara [203]

Answer:

 70 °

Step-by-step explanation:

We have that one side of the rhombus is equal to 4 cm and an angle of the rhombus is 110 degrees. We know that the adjacent sides of a rhombus are supplementary, which means that the sum of the angles must be 180 degrees.

We can assume that the other angle is x.

110 ° + x = 180 °

x = 180 ° -110 °

x = 70 °

The measure of the missing angle on the diagram will be 70 °.

3 0
3 years ago
What is 13 over 26 equal to?
worty [1.4K]
Answer = 0.5
 hope this helps
4 0
3 years ago
Read 2 more answers
Other questions:
  • Y + 4/5 = 3/4<br><br>What is y?
    10·1 answer
  • True or false <br><br>2,000 mm = 2 m<br><br>5m = 550 cm<br><br>3,400 mm = 34 cm<br><br>7 dm = 700 mm
    8·1 answer
  • Need help !! trying to solve this can someone please explain this to me
    8·1 answer
  • What is 2 and 3/4 times 4
    6·2 answers
  • How to get a perimeter of 200
    12·1 answer
  • Help pls. i’m taking a geometry quiz and don’t really understand
    14·1 answer
  • Draw an area model to represent the following expressions. <br>25x32?​
    7·1 answer
  • Descending order 20,-30,4,0,-3,10​
    8·2 answers
  • Solve for t.<br><br> t/-3.2 &lt; 5
    6·1 answer
  • Hello pls help meeee
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!